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Auto Dimming Morror Cadillac DeVille Concours I final

Mirrors 2 illustrations ~7730 words

DESCRIPTION

Electrochromatic day/night rearview mirror automatically changes reflectance to reduce glare from headlights. At night, as glare of headlights from behind increases, mirror will gradually become darker to absorb glare. During daylight or when gearshift lever is in Reverse, mirror will be clear and fully reflective. On some models, driver's side outside mirror will also be an electrochromatic day/night mirror that is controlled by inside mirror. On some models, inside rearview mirrors also include a compass.

OPERATION

Day/night mirror(s) use a thin layer of electrochromatic material between 2 plates of conductive glass. Two photocell sensors signal levels of light to a logic circuit. A forward-facing photocell sensor measures ambient light levels. A rear-facing photocell sensor measures glare from approaching vehicle headlights. When logic circuit senses more light from the headlight sensor than the ambient light sensor, the electrochromatic drive circuit applies voltage to mirror(s). Approximately 1.15 volts is applied to mirror(s) when a large amount of glare is present, causing mirror(s) to darken. Voltage will be reduced to 0.01 volt when both photocells indicate the same light level.

When gearshift lever is shifted into Reverse, battery voltage is applied to mirror reset terminal. Mirror will gradually change to a clear state for better vision when backing up.

Calibration (Aurora, DeVille, Eighty Eight, Eldorado, LeSabre, LSS, Riviera, Seville, Sierra & Silverado)

If after 2 seconds, compass does not show a direction, check for possible magnetic interference (magnetic antenna mount, etc.). If the letter "C" appears in compass window, mirror needs calibration. Mirror can be calibrated in one of 2 ways, either by driving in circles at 5 MPH (8 km/h) or less until display reads a direction, or driving an every day routine.

Calibration (Bonneville)

Press and hold MODE button until CALIBRATE light appears. Release MODE button. Heading display will start to rotate. Drive in small circles at 10 MPH (16 km/h) or less until CALIBRATE light goes out (approximately 1-5 circles). Compass is calibrated when direction bars are on and CALIBRATE light is off.

Variance (Aurora, DeVille, Eighty Eight, Eldorado, LeSabre, LSS & Riviera)

Determine correct zone location. (Scheme 1) Press and hold COMPASS button on bottom of mirror until a zone number appears in display. Continue holding COMPASS button until correct zone appears. Release COMPASS button. Compass heading will appear within a few seconds.

Scheme 1

Scheme 1: Variance (Aurora, DeVille, Eighty Eight, Eldorado, LeSabre, LSS & Riviera)
Scheme 1: Variance (Aurora, DeVille, Eighty Eight, Eldorado, LeSabre, LSS & Riviera)

Variance (Bonneville)

Determine correct zone location. (Scheme 1) Press and hold MODE button until zone number appears. Release MODE button. Press MODE button until correct zone number appears.

Variance (Seville)

Determine correct zone location. (Scheme 1) Insert end of a paper clip into hole on bottom of mirror. Press and hold calibration switch (approximately 5 seconds) until a zone number appears in display. In order to change current zone setting, press and hold calibration switch until correct zone appears. Release switch. Compass heading will appear within a few seconds. To adjust compass heading, see appropriate CALIBRATION.

Variance (Sierra & Silverado)

Determine correct zone location. (Scheme 1) Turn ignition switch to RUN position. Press and hold COMP button on bottom of mirror until a zone number appears in display. Toggle COMP button until correct zone appears. Release COMP button. Compass heading will appear within a few seconds.

AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK

  1. Turn ignition switch to RUN position. Move gearshift lever into Park. Move mirror switch to MAXIMUM, ON or MIRROR position, if necessary. Cover ambient light sensor (windshield side of mirror) with a dark cloth. Shine light on headlight sensor (on mirror side). Mirror should gradually darken.
  2. Move gearshift lever into Reverse. Mirror should gradually lighten to a clear state. Move gearshift lever into Park. Mirror should gradually darken. Remove cloth and light. Mirror should gradually lighten to a clear state. If vehicle is equipped with compass, turn on compass. Compass direction display should be on. If mirror does not operate as specified, go to «SYSTEM TESTS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__system-tests) .

SYSTEM TESTS

Note. To identify connectors, terminlas and wire colors, see WIRING DIAGRAMS .

Automatic Day/Night Mirror Inoperative

  1. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING. Go to next step.
  2. Turn ignition switch to RUN position. Using DVOM, measure voltage between automatic day/night mirror harness connector terminal No. 1 (Pink wire) and ground. (Scheme 2) If battery voltage exists, go to step 4. If battery voltage does not exist, go to next step.
  3. Repair open in Pink wire between automatic day/night mirror terminal No. 1 and instrument panel fuse block under left side of instrument panel fastened to hinge pillar. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  4. Connect DVOM between automatic day/night mirror harness connector terminals No. 1 (Pink wire) and No. 2 (Black/White wire). (Scheme 2) If battery voltage exists, go to step 6. If battery voltage does not exist, go to next step.
  5. Repair open in Black/White wire between automatic day/night mirror terminal No. 2 and ground connection G202. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  6. Place shift lever in Park. Using DVOM, measure voltage between ground and automatic day/night mirror harness connector terminal No. 3 (Light Green wire). (Scheme 2) If battery voltage exists, go to next step. If battery voltage does not exist, go to step 8.
  7. Remove Park Neutral Position (PNP) switch. Using DVOM connected to ground, measure voltage at inside rearview mirror harness connector terminal No. 3 (Light Green wire). (Scheme 2) If battery voltage exists, go to next step. If battery voltage does not exist, go to step 9.
  8. Repair short to battery voltage in Light Green wire between inside rearview mirror connector terminal No. 3 and PNP switch connector C1, terminal "F". After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  9. Replace automatic day/night mirror. See «REARVIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__rearview-mirror) under REMOVAL & INSTALLATION. After replacing mirror, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  10. Replace PNP switch. See appropriate article in AUTOMATIC TRANSMISSION SERVICING. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.

Scheme 2

Scheme 2
Scheme 2

Automatic Day/Night Mirror Inoperative In Reverse

  1. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING. Go to next step.
  2. Turn ignition switch to RUN position. Move shift lever to Reverse. If back-up lights illuminate, go to next step. If back-up lights do not illuminate, locate and repair problem in back-up lighting system. See appropriate WIRING DIAGRAM in BACK-UP LIGHTS article.
  3. Using DVOM, measure voltage between ground and automatic day/night mirror harness connector terminal No. 3 (Light Green wire). (Scheme 2) If battery voltage exists, go to next step. If battery voltage does not exist, go to step 7.
  4. Using DVOM, measure voltage between automatic day/night mirror harness connector terminals No. 3 (Light Green wire) and No. 2 (Black/White wire). (Scheme 2) If battery voltage exists, go to next step. If battery voltage does not exist, go to step 6.
  5. Replace automatic day/night mirror. See «REARVIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__rearview-mirror) under REMOVAL & INSTALLATION. After replacing mirror, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  6. Repair open in Black/White wire between automatic day/night mirror terminal No. 2 and ground connection G202. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  7. Repair open in Light Green wire between automatic day/night mirror terminal No. 3 and Park Neutral Position (PNP) switch connector C1, terminal "F". After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.

Outside Automatic Day/Night Mirror Inoperative

  1. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING. Go to next step.
  2. Disconnect left outside mirror connector. Using DVOM, measure resistance of Gray wire between automatic day/night mirror harness connector terminal No. 4 and left outside mirror harness connector terminal "A" (without memory system) or terminal "E" (with memory system). (Scheme 2) If resistance is 5 ohms or less, go to step 4. If resistance is more than 5 ohms, go to next step.
  3. Repair open in Gray wire between automatic day/night mirror and left outside mirror. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  4. Using DVOM, measure resistance of Pink wire between automatic day/night mirror harness connector terminal No. 5 and left outside mirror connector terminal "B" (without memory system) or terminal "F" (with memory system). If resistance is more than 5 ohms, go to next step. If resistance is less than 5 ohms, go to step 6.
  5. Repair open in Pink wire between automatic day/night mirror harness connector terminal No. 5 and left outside mirror connector terminal "B" (without memory system) or terminal "F" (with memory system). After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  6. Using DVOM, measure resistance between automatic day/night mirror harness connector terminals No. 4 (Gray wire) and No. 5 (Pink wire). (Scheme 2) If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, go to step 8.
  7. Repair short between automatic day/night mirror harness connector terminals No. 4 (Gray wire) and No. 5 (Pink wire). After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  8. Replace left outside mirror. See appropriate POWER MIRRORS article. After replacing mirror, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  1. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING. Go to next step.
  2. Turn ignition switch to RUN position. Using DVOM, measure voltage between automatic day/night mirror harness connector terminal No. 1 (Pink/Black wire) and ground. If battery voltage exists, go to step 4 . If battery voltage does not exist, go to next step.
  3. Repair open in circuit No. 39 between automatic day/night mirror harness connector terminal No. 1 and fuse block under left side of instrument panel. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  4. Connect test light between battery voltage and automatic day/night mirror harness connector terminal No. 2. If test light illuminates, go to step 6 . If test light does not illuminate, go to next step.
  5. Repair open in circuit No. 251 (Eighty Eight and LSS) or No. 1250 (Bonneville and LeSabre) between automatic day/night mirror harness connector terminal No. 2 and ground. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  6. Using DVOM connected to ground, measure voltage at automatic day/night mirror harness connector terminal No. 3 (Light Green wire). If battery voltage exists, go to next step. If battery voltage does not exist, go to step 8 .
  7. Repair short to battery voltage in Light Green wire between automatic day/night mirror harness connector terminal No. 3 and Park/Neutral Position (PNP) switch connector C1, terminal "F". After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  8. Replace automatic day/night mirror. See «REARVIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__rearview-mirror) under REMOVAL & INSTALLATION. After replacing mirror, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  1. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING. Go to next step.
  2. Check operation of back-up lights. If back-up lights illuminate, go to next step. If back-up lights do not illuminate, go to step 7 .
  3. Using DVOM, measure resistance of Light Green wire between automatic day/night mirror harness connector terminal No. 3 and Park/Neutral Position (PNP) switch connector C1, terminal "F". If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, go to step 12 .
  4. Using DVOM, measure resistance between ground and automatic day/night mirror harness connector terminal No. 2. If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, go to step 6 .
  5. Replace automatic day/night mirror. See «REARVIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__rearview-mirror) under REMOVAL & INSTALLATION. After replacing mirror, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  6. Repair open in circuit No. 251 (Eighty Eight and LSS) or No. 1250 (Bonneville and LeSabre) between automatic day/night mirror harness connector terminal No. 2 and ground. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  7. Check for an open in circuit No. 539 (Pink wire). If circuit No. 539 is open, go to next step. If circuit No. 539 is okay, go to step 9 .
  8. Repair open in circuit No. 539 (Pink wire). After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  9. Check Park/Neutral Position (PNP) switch connector C1, terminals "F" and "B" for poor connection. If connections are okay, go to next step. If poor connection is found, go to step 11 .
  10. Replace PNP switch. See appropriate article in AUTOMATIC TRANSMISSION SERVICING. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  11. Repair poor connection at PNP switch connector C1, terminals "F" and/or "B". After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  12. Repair open in Light Green wire between automatic day/night mirror harness connector terminal No. 3 and PNP switch connector C1, terminal "F". After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  1. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING. Go to next step.
  2. Disconnect left outside mirror connector. Using DVOM, measure resistance of Gray wire between left outside mirror harness connector terminal "D" and automatic day/night mirror harness connector terminal No. 4. If resistance is 5 ohms or less, go to step 4 . If resistance is more than 5 ohms, go to next step.
  3. Repair open in Gray wire between left outside mirror and automatic day/night mirror. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  4. Using DVOM, measure resistance of Pink wire between left outside mirror harness connector terminal "G" and automatic day/night mirror harness connector terminal No. 5. If resistance is 5 ohms or less, go to step 6 . If resistance is more than 5 ohms, go to next step.
  5. Repair open in Pink wire between left outside mirror harness connector terminal "G" and automatic day/night mirror harness connector terminal No. 5. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  6. Using DVOM, measure resistance between automatic day/night mirror harness connector terminals No. 4 (Gray wire) and No. 5 (Pink wire). If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, go to step 8 .
  7. Repair short between automatic day/night mirror harness connector terminals No. 4 (Gray wire) and No. 5 (Pink wire). After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  8. Replace left outside mirror. See appropriate POWER MIRRORS article. After replacing mirror, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  1. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING. Go to next step.
  2. Disconnect automatic day/night mirror connector. Turn ignition switch to RUN position. Using DVOM, measure voltage between automatic day/night mirror harness connector terminal No. 11 (Brown wire) and ground. If battery voltage exists, go to step 4 . If battery voltage does not exist, go to next step.
  3. Repair high resistance or open in Brown wire between automatic day/night mirror harness connector terminal No. 11 and fuse block. Fuse block is mounted to instrument panel, below and left of steering column. After repair, go to step 9 .
  4. Using DVOM, measure resistance between automatic day/night mirror harness connector terminal No. 8 (Black wire) and ground. If resistance is less than 5 ohms, go to step 6 . If resistance is 5 ohms or more, go to next step.
  5. Repair high resistance or open in Black wire between automatic day/night mirror harness connector terminal No. 8 and ground connection G103, located in left front of engine compartment under battery. After repair, go to step 9 .
  6. Turn parking lights on. Using DVOM, measure voltage between automatic day/night mirror harness connector terminal No. 9 (Brown/Blue wire) and ground. If battery voltage exists, go to step 8 . If battery voltage does not exist, go to next step.
  7. Repair high resistance or open in Brown/Blue wire between automatic day/night mirror harness connector terminal No. 9 and multifunction relay K134. Multifunction relay K134 is located under left side of instrument panel. After repair, go to step 9 .
  8. Replace automatic day/night mirror. See «REARVIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__rearview-mirror) under REMOVAL & INSTALLATION. After repair, go to next step.
  9. Reconnect all connectors and components. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  1. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING. Go to next step.
  2. Turn ignition on. Move gearshift lever to Reverse. If back-up lights illuminate, go to next step. If back-up lights do not illuminate, locate and repair problem in back-up lighting system. See appropriate WIRING DIAGRAM in BACK-UP LIGHTS article.
  3. Disconnect automatic day/night mirror connector. Move gearshift lever to Reverse. Using DVOM, measure voltage between automatic day/night mirror harness connector terminal No. 10 (White/Black wire) and ground. If battery voltage exists, go to step 5 . If battery voltage does not exist, go to next step.
  4. Repair high resistance or open in White/Black wire between automatic day/night mirror harness connector terminal No. 10 and Park Neutral Position (PNP) switch, located on left side of transmission housing. After repair, go to step 6 .
  5. Replace automatic day/night mirror. See «REARVIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__rearview-mirror) under REMOVAL & INSTALLATION. After replacing mirror, go to next step.
  6. Reconnect all connectors and components. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  1. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING. Go to next step.
  2. Check R/CMPT REL fuse (7.5-amp) located in underhood accessory wiring junction block, located on right front strut tower. If fuse is open, go to step 7. If fuse is okay, go to next step.
  3. Check HVAC fuse (10-amp) located in fuse block, right side of instrument panel, in right front door opening. If fuse is open, go to step 8. If fuse is okay, go to next step.
  4. Disconnect automatic day/night mirror harness connector. Turn ignition switch to RUN position. Connect test light between automatic day/night mirror harness connector terminal No. 1 (Brown wire) and ground. (Scheme 2) If test light illuminates, go to next step. If test light does not illuminate, go to step 11.
  5. Connect test light between automatic day/night mirror harness connector terminals No. 1 (Brown wire) and No. 2 (Black wire). (Scheme 2) If test light illuminates, go to next step. If test light does not illuminate, go to step 12.
  6. Check for poor connection at automatic day/night mirror harness connector. If poor connection is found, go to step 9. If automatic day/night mirror harness connection is okay, go to step 10.
  7. Repair short to ground in Orange wire between underhood accessory wiring junction block and Park Neutral Position (PNP) switch. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  8. Repair short to ground in Brown wire between HVAC fuse and automatic day/night mirror harness connector terminal No. 1. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  9. Repair poor connection at automatic day/night mirror harness connector. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  10. Replace automatic day/night mirror. See «REARVIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__rearview-mirror) under REMOVAL & INSTALLATION. After replacing automatic day/night mirror, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  11. Repair poor connection or open in Brown wire between HVAC fuse and automatic day/night mirror harness connector terminal No. 1. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  12. Repair poor connection or open in Black wire between automatic day/night mirror harness connector terminal No. 2 and ground connection G402. Ground connection G402 is located inside rear compartment below right side of rear window trim panel. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  1. Disconnect automatic day/night mirror harness connector. Turn ignition switch to RUN position. Move gearshift lever to Reverse. Connect test light between automatic day/night mirror harness connector terminal No. 3 (Light Green wire) and ground. (Scheme 2) If test light illuminates, go to next step. If test light does not illuminate, go to step 3.
  2. Replace automatic day/night mirror. See «REARVIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__rearview-mirror) under REMOVAL & INSTALLATION. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  3. Disconnect Park Neutral Position (PNP) switch 7-pin connector C1 (Gray) located left of engine on transaxle. Connect test light between PNP switch connector C1 terminal "B" (Orange wire) and ground. If test light illuminates, go to next step. If test light does not illuminate, go to step 5.
  4. Check for poor connection or open in Light Green wire between PNP switch, underhood accessory wiring junction block (located at right strut tower), and automatic day/night mirror harness connector. Repair as necessary. If Light Green wire is okay, adjust or replace PNP switch. See appropriate article in AUTOMATIC TRANSMISSION SERVICING. After repairs, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  5. Repair poor connection or open in Orange wire between PNP switch connector C1 and underhood accessory wiring junction block 68-pin connector C1 (Black) located at right strut tower. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.

DEVILLE & ELDORADO

Note. Platform Zone Module (PZM) may also be referred to as Body Control Module (BCM).

  1. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING. Go to next step.
  2. Disconnect automatic day/night mirror harness connector. Turn ignition switch to RUN position. Using DVOM, measure voltage between automatic day/night mirror harness connector terminal No. 1 (Yellow wire) and ground. (Scheme 2) If battery voltage exists, go to next step. If battery voltage does not exist, go to step 5.
  3. Using DVOM, measure voltage between automatic day/night mirror harness connector terminals No. 1 (Yellow wire) and No. 2 (Black wire). (Scheme 2) If battery voltage exists, go to next step. If battery voltage does not exist, go to step 6.
  4. Replace automatic day/night mirror. See «REARVIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__rearview-mirror) under REMOVAL & INSTALLATION. After replacing mirror, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  5. Repair open or short to ground in Yellow wire between automatic day/night mirror and rear compartment fuse block. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  6. Repair open in Black wire between automatic day/night mirror harness connector and ground. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  1. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING. Go to next step.
  2. Using DVOM connected to ground, backprobe reverse relay terminal D3 (Orange wire) and record reading. Reverse relay is located in rear compartment relay center No. 5, attached to the electronics bay. Backprobe reverse relay terminal D1 (Orange wire) and record reading. If battery voltage exists at both terminals, go to next step. If battery voltage does not exist at both terminals, go to step 10 .
  3. Remove reverse relay from rear compartment relay center No. 5. Cover ambient light sensor (on windshield side of mirror) with a dark cloth. Shine an incandescent light on the headlight sensor (on mirror side). Mirror should gradually darken. Connect a fused jumper wire between reverse relay socket terminals D3 (Orange wire) and C1 (Light Green wire). If mirror returns to a clear state, go to next step. If mirror does not return to a clear state, go to step 8 .
  4. Using DVOM, backprobe between reverse relay terminals D1 (Orange wire) and C3 (Dark Green wire). Place gearshift lever in Reverse. If battery voltage exists, go to next step. If battery voltage does not exist, go to step 6 .
  5. Replace reverse relay. After replacing relay, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  6. Check for open in Dark Green wire between reverse relay and Platform Zone Module (PZM). If Dark Green wire is okay, go to next step. If Dark Green wire is open, go to step 11 .
  7. Replace PZM. See appropriate BODY CONTROL MODULES article. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  8. Check for open in Light Green wire between reverse relay and automatic day/night mirror harness connector. If Light Green is okay, go to next step. If Light Green is open, go to step 12 .
  9. Replace automatic day/night mirror. See «REARVIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__rearview-mirror) under REMOVAL & INSTALLATION. After replacing mirror, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  10. Repair open or short to ground in Orange wire between reverse relay and engine compartment fuse/relay center, located near left front strut tower. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  11. Repair open in Dark Green wire between reverse relay and PZM. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  12. Repair open in Light Green wire between reverse relay and automatic day/night mirror harness connector. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  1. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING. Go to next step.
  2. Disconnect automatic day/night mirror harness connector. Disconnect left outside mirror connector. On models equipped with memory mirrors, use DVOM to measure resistance of Gray wire between automatic day/night mirror harness connector terminal No. 4 and left outside mirror connector C2, terminal "E". (Scheme 2) On models not equipped with memory mirrors, use DVOM to measure resistance of Gray wire between automatic day/night mirror harness connector terminal No. 4 and left outside mirror connector C3, terminal "A". On all models, if resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, go to step 6.
  3. On models equipped with memory mirrors, use DVOM to measure resistance between automatic day/night mirror harness connector terminal No. 5 (Pink/Black wire) and left outside mirror connector C1, terminal "F" (Pink wire). (Scheme 2) On models not equipped with memory mirrors, use DVOM to measure resistance between automatic day/night mirror harness connector terminal No. 5 (Pink/Black wire) and left outside mirror connector C1, terminal "B" (Pink wire). If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, go to step 7.
  4. Using DVOM, measure resistance between automatic day/night mirror harness connector terminals No. 4 (Gray wire) and No. 5 (Pink/Black wire). (Scheme 2) If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, go to step 8.
  5. Replace left outside mirror face. See appropriate POWER MIRRORS article. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  6. Repair open in Gray or Gray/Black wire between automatic day/night mirror harness connector and left outside mirror. After repairs, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  7. Repair open in Pink or Pink/Black wire between automatic day/night mirror harness connector and left outside mirror harness connector. After repairs, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  8. Repair short from Gray or Gray/Black wire to Pink or Pink/Black wire between automatic day/night mirror harness connector and left outside mirror harness connector. After repairs, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.

Inside Automatic Day/Night Mirror Inoperative

  1. Check B/U LAMP fuse (10-amp) located in underhood accessory wiring junction block. Underhood accessory wiring junction block is mounted to right front strut tower. If B/U LAMP fuse is open, go to next step. If B/U LAMP fuse is okay, go to step 3 .
  2. Repair short to ground in Orange wire between underhood accessory wiring junction block connector C1, terminal "B" and Park Neutral Position (PNP) switch connector C1, terminal "F". After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  3. Check SUNROOF fuse (20-amp) located in glove compartment fuse block. If SUNROOF fuse is open, go to next step. If SUNROOF fuse is okay, go to step 5 .
  4. Repair short in Yellow wire between fuse block and automatic day/night mirror harness connector terminal No. 1. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  5. Disconnect automatic day/night mirror harness connector. Turn ignition switch to RUN position. Connect test light between automatic day/night mirror harness connector terminal No. 1 (Yellow wire) and ground. If test light illuminates, go to next step. If test light does not illuminate, go to step 10 .
  6. Connect test light between automatic day/night mirror harness connector terminals No. 1 (Yellow wire) and No. 2 (Black wire). If test light illuminates, go to next step. If test light does not illuminate, go to step 11 .
  7. Check for poor connection or open at automatic day/night mirror harness connector. If poor connection or open is found, go to next step. If wiring and connection are okay, go to step 9 .
  8. Repair poor connection or open at automatic day/night mirror harness connector. Retest system. If symptom still exists after repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  9. Replace automatic day/night mirror. See «REARVIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__rearview-mirror) under REMOVAL & INSTALLATION. If symptom still exists after repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  10. Repair poor connection or open in Yellow wire between fuse block and automatic day/night mirror harness connector terminal No. 1. Retest system. If symptom still exists after repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  11. Repair poor connection or open in Black wire between automatic day/night mirror harness and ground connection G302. Ground connection G302 is located forward of right front seat, near right door sill. Retest system. If symptom still exists after repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.

Mirror Does Not Switch To Clear In Reverse

  1. Disconnect automatic day/night mirror harness connector. Turn ignition switch to RUN position. Move shift lever to reverse. Connect test light between mirror harness connector terminal No. 3 (Light Green wire) and ground. If test light illuminates, go to step 4 . If test light does not illuminate, go to next step.
  2. Disconnect Park Neutral Position (PNP) switch connector C1, located left of engine on transaxle. Connect test light between PNP switch connector C1, terminal "B" (Orange wire) and ground. If test light illuminates, go to next step. If test light does not illuminate, go to step 7 .
  3. Check for poor connection or open in Light Green wire between PNP switch connector C1, terminal "F" , and automatic day/night mirror harness connector terminal No. 3. If poor connection or open is found, go to step 5 . If wiring is okay, go to step 6 .
  4. Replace automatic day/night mirror. See «REARVIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__rearview-mirror) under REMOVAL & INSTALLATION. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  5. Repair poor connection or open in Light Green wire between PNP switch connector C1, terminal "F" and automatic day/night mirror harness connector terminal No. 3. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  6. Adjust or replace PNP switch. See appropriate article in AUTOMATIC TRANSMISSION SERVICING. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  7. Repair poor connection or open in Orange wire between underhood accessory wiring junction block connector C1, terminal A8 and PNP switch connector C1, terminal "B". After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  1. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING. Go to next step.
  2. Disconnect automatic day/night mirror harness connector. Connect test light between automatic day/night mirror harness connector terminals No. 2 (Black/White wire) and No. 3 (Light Green wire). (Scheme 2) Turn ignition switch to RUN position. Move shift lever in and then out of Reverse while observing test light. If test light illuminates when shift lever is in Reverse, go to next step. If test light does not illuminate when shift lever is in Reverse, go to step 4.
  3. Connect test light between automatic day/night mirror harness connector terminals No. 1 (Brown wire) and No. 2 (Black/White wire). (Scheme 2) If test light illuminates, go to step 6. If test light does not illuminate, go to step 5.
  4. Move shift lever to Reverse. If back-up lights illuminate, go to step 7. If back-up lights do not illuminate, locate and repair problem in back-up lighting system. See appropriate WIRING DIAGRAM in BACK-UP LIGHTS article.
  5. Repair open in circuit No. 241 (Brown wire). After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  6. Replace automatic day/night mirror. See «REARVIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__rearview-mirror) under REMOVAL & INSTALLATION. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  7. Repair open in circuit No. 24 (Light Green wire) between instrument panel fuse block and inside rearview mirror harness connector terminal No. 3. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  1. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING. Go to next step.
  2. Disconnect Driver Door Module (DDM) connector C5. DDM is located behind left door trim, in center front of door. Turn ignition switch to RUN position. Cover forward light sensor to simulate darkness. Shine light into rear light sensor. Using DVOM, measure voltage between DDM (component-side) terminals "C" and "D". If reading is 0-1.2 volts, go to next step. If reading is not 0-1.2 volts, go to step 4 .
  3. Using DVOM, check for continuity in circuits No. 1690 and 1691 (Black wires). If any opens are found, go to next step. If circuits No. 1690 and 1691 are okay, go to step 5 .
  4. Repair circuit as necessary. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  5. Replace left outside mirror. See appropriate POWER MIRRORS article. After replacing mirror, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.

Compass Inoperative Or Inaccurate

  1. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING. Go to next step.
  2. Disconnect automatic day/night mirror harness connector. Connect test light between automatic day/night mirror harness connector terminals No. 1 (Brown wire) and No. 2 (Black/White wire). (Scheme 2) If test light illuminates, go to next step. If test light does not illuminate, go to step 4.
  3. Replace automatic day/night mirror. See «REARVIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__rearview-mirror) under REMOVAL & INSTALLATION. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  4. Check for open or shorted power circuit. Repair as necessary. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.

Automatic Day/Night Mirror Does Not Change

  1. Perform «AUTOMATIC DAY/NIGHT MIRRORS SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check). Go to next step.
  2. Disconnect automatic day/night mirror harness connector. Turn ignition switch to RUN position. Using DVOM, check voltage between automatic day/night mirror harness connector terminal No. 1 (Brown wire) and ground. (Scheme 2) If 10-15 volts exists, go to next step. If 10-15 volts does not exist, go to step 9.
  3. Using DVOM, check voltage between automatic day/night mirror harness connector terminals No. 1 (Brown wire) and No. 2 (Black/White wire). (Scheme 2) If 10-15 volts exists, go to next step. If 10-15 volts does not exist, go to step 13.
  4. Check rear junction block NSBU fuse (10-amp) for an open. Rear junction block is located under left side of rear seat, below rear relay center. If fuse is okay, go to next step. If fuse is open, go to step 14.
  5. Using DVOM, check voltage between automatic day/night mirror harness connector terminals No. 3 (Light Green wire) and No. 2 (Black/White wire). (Scheme 2) If 10-15 volts exists, go to step 16. If 10-15 volts does not exist, go to next step.
  6. Disconnect Drivers Door Module (DDM) 20-pin connector C1 (Black). Using DVOM, check resistance between automatic day/night mirror harness connector terminals No. 4 (Gray/Black wire) and No. 5 (Pink wire). (Scheme 2) If resistance is less than 5 ohms, go to step 22. If resistance is 5 ohms or more, go to next step.
  7. Using DVOM, check voltage between automatic day/night mirror harness connector terminal No. 1 (Brown wire) and No. 4 (Gray/Black wire). (Scheme 2) If 10-15 volts exists, go to step 23. If 10-15 volts does not exist, go to next step.
  8. Replace automatic day/night mirror. See «REARVIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__rearview-mirror) under REMOVAL & INSTALLATION. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  9. Visually check rear junction block IGN 3 RR fuse (10-amp) for an open. Rear junction block is located under left side of rear seat, below rear relay center. If IGN 3 RR fuse is okay, go to next step. If IGN 3 RR fuse is not okay, go to step 11.
  10. Repair open in Brown wire between rear junction block and automatic day/night mirror harness connector. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  11. Repair short to ground in Brown wire between rear junction block and automatic day/night mirror harness connector. After repair, go to next step.
  12. Replace IGN 3 RR fuse (10-amp) in rear junction block. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  13. Repair open in Black/White wire between automatic day/night mirror harness connector and ground. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  14. Repair short to ground in Light Green wire between rear junction block and automatic day/night mirror harness connector. After repair, go to next step.
  15. Replace NSBU fuse (10-amp) in rear junction block. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  16. Using DVOM connected to battery voltage, backprobe rear junction block connector C1, terminal B7 (Light Green wire). If 10-15 volts exists, go to next step. If 10-15 volts does not exist, go to step 19.
  17. Remove reverse relay from rear junction block. Disconnect Rear Integration Module (RIM) 16-pin connector C1 (Gray). Using DVOM, check resistance between RIM connector C1 terminal A8 (Light Green wire) and ground. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, go to step 24.
  18. Replace RIM. See appropriate BODY CONTROL MODULES article. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  19. Remove reverse relay from rear junction block. If automatic day/night mirror operates properly, go to next step. If automatic day/night mirror does not operate properly, go to step 21.
  20. Replace reverse relay in rear junction block. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  21. Repair short to power in Light Green wire between rear junction block and automatic day/night mirror. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  22. Repair short between Gray/Black wire and Pink wire. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  23. Repair short to ground in Gray/Black wire between automatic day/night mirror and Drivers Door Module (DDM). Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  24. Repair short to ground in Light Green wire between rear junction block and RIM. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  1. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING. Go to next step.
  2. Disconnect automatic day/night mirror harness connector. Disconnect Drivers Door Module (DDM) 20-pin connector C1 (Black). Using DVOM, measure resistance between automatic day/night mirror harness connector terminal No. 4 (Gray/Black wire) and DDM connector C1 terminal No. 9 (Gray wire). (Scheme 2) If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, go to step 7.
  3. Using DVOM, measure resistance of Pink wire between automatic day/night mirror harness connector terminal No. 5 and DDM connector C1 terminal No. 10. (Scheme 2) If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, go to step 8.
  4. Reconnect DDM connector C1. Disconnect DDM 8-pin connector C4 (Black). Turn ignition switch to RUN position. Place automatic day/night mirror switch in ON position. Using DVOM, check voltage between DDM 8-pin connector C4, terminals No. 2 (Brown/Black wire) and No. 3 (Brown wire). If 0-1.2 volts exists, go to next step. If 0-1.2 volts does not exist, go to step 6.
  5. Replace left outer mirror. See appropriate POWER MIRRORS article. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  6. Replace DDM. See appropriate POWER MIRRORS article. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  7. Repair open in Brown/Black wire between automatic day/night mirror and DDM. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  8. Repair open in Brown wire between automatic day/night mirror and DDM. After repair, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  1. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING. Go to next step.
  2. Turn ignition switch to RUN position. Depress COMPASS button on automatic day/night mirror switch. If compass displays a direction, go to next step. If compass does not display a direction, go to step 5 .
  3. If compass displays correct direction, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING. If compass does not display correct direction, go to next step.
  4. Calibrate compass to proper zone. See «COMPASS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror) under ADJUSTMENTS. If compass now displays correct direction, perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING. If compass still does not display correct direction, go to next step.
  5. Replace automatic day/night mirror. See «REARVIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__rearview-mirror) under REMOVAL & INSTALLATION. Perform «AUTOMATIC DAY/NIGHT MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__automatic-daynight-mirror-system-check) under TROUBLE SHOOTING.
  1. Disconnect automatic day/night mirror harness connector. Turn ignition switch to RUN position. Using DVOM, measure voltage between automatic day/night mirror harness connector terminal No. 1 (Pink wire) and ground. (Scheme 2) If battery voltage exists, go to next step. If battery voltage does not exist, go to step 3.
  2. Connect DVOM between automatic day/night mirror harness connector terminals No. 1 (Pink wire) and No. 2 (Black wire). (Scheme 2) If battery voltage exists, go to step 4. If battery voltage does not exist, go to step 5.
  3. Repair open in Pink wire between automatic day/night mirror harness connector terminal No. 1 and Left Bussed Electrical Center (LBEC) connector C1, terminal A4. LBEC is located on lower left side of instrument panel.
  4. Replace automatic day/night mirror. See «REARVIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__rearview-mirror) under REMOVAL & INSTALLATION.
  5. Repair open in Black wire between automatic day/night mirror harness connector terminal No. 2 and ground connection G203. Ground G203 is located on left upper instrument panel, at "A" pillar.
  1. Disconnect automatic day/night mirror harness connector. Turn ignition switch to RUN position. Using DVOM, measure voltage between automatic day/night mirror harness connector terminal No. 1 (Pink wire) and ground. (Scheme 2) If battery voltage exists, go to next step. If battery voltage does not exist, go to step 3.
  2. Connect test light between battery voltage and automatic day/night mirror harness connector terminal No. 2 (Black wire). (Scheme 2) If test light illuminates, go to step 4. If test light does not illuminate, go to next step.
  3. Repair open in Pink wire between automatic day/night mirror harness connector terminal No. 1 and Left Bussed Electrical Center (LBEC) connector C1, terminal A4. LBEC is located on lower left side of instrument panel.
  4. Replace automatic day/night mirror. See «REARVIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__rearview-mirror) under REMOVAL & INSTALLATION.
  5. Repair open in Black wire between automatic day/night mirror harness connector terminal No. 2 and ground connection G203. Ground G203 is located on left upper instrument panel, at "A" pillar.
  1. Disconnect automatic day/night mirror harness connector. Turn ignition switch to RUN position. Place shift lever in Reverse. Connect test light between automatic day/night mirror harness connector terminal No. 3 (Light Green wire). (Scheme 2) If test light illuminates, go to step 4. If test light does not illuminate, go to next step.
  2. Check operation of back-up lights. If back-up lights illuminate, go to step 4. If back-up lights do not illuminate, locate and repair problem in back-up lighting system. See appropriate WIRING DIAGRAM in BACK-UP LIGHTS article.
  3. Replace automatic day/night mirror. See «REARVIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__rearview-mirror) under REMOVAL & INSTALLATION.
  4. Repair open in Light Green wire between automatic day/night mirror harness connector terminal No. 3 and Underhood Bussed Electrical Center (UBEC) connector C1, terminal B10. UBEC is located at left side of engine compartment, near battery.
  1. Turn ignition switch to RUN position. If mirror display is totally blank, go to step 5 . If mirror display is not totally blank, go to next step.
  2. If letter "C" is displayed on mirror, go to next step. If letter "C" is not displayed on mirror, go to step 4 .
  3. Perform compass calibration procedure. See «Calibration (DeVille, Eighty Eight, Eldorado, LeSabre, LSS, Seville, Sierra & Silverado)»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__calibration-aurora-deville-eighty-eight-eldorado) under ADJUSTMENTS.
  4. Perform compass variance procedure. See «Variance (Sierra & Silverado)»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__variance-sierra-silverado) under ADJUSTMENTS.
  5. Replace automatic day/night mirror. See «REARVIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__rearview-mirror) under REMOVAL & INSTALLATION. Perform compass calibration and variance procedures. See «Calibration (DeVille, Eighty Eight, Eldorado, LeSabre, LSS, Seville, Sierra & Silverado)»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__calibration-aurora-deville-eighty-eight-eldorado) and «Variance (Sierra & Silverado)»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#auto-dimming-morror__variance-sierra-silverado) under ADJUSTMENTS.

REMOVAL & INSTALLATION

WARNINGElectrochromatic material may irritate eyes and skin. In case of eye contact, rinse thoroughly with water. In case of skin contact, wash thoroughly with soap and water. If material is ingested, consult a physician or poison control center immediately.

Note. Electrochromatic mirror cannot be repaired, and must be replaced as an assembly. DO NOT use ammonia-based cleansers on electrochromatic day/night mirrors. Spraying cleansers directly on mirrors is not recommended.

Note. For removal and installation procedure for outside mirror assemblies, see appropriate POWER MIRRORS article.

REARVIEW MIRROR

Note. It is not necessary to use tools or other objects to pry mirror mount or mirror away from windshield. Use of tools may damage mirror, mirror mount or windshield.

Removal & Installation (Catera)

Note. Mirror cover cannot be removed from mirror until mirror is removed from windshield support.

  1. Rock mirror from side to side, and pull mirror down firmly. DO NOT pull rearward on mirror, or mirror support or windshield may be damaged. Disconnect electrical connector. Remove inside mirror support. Unsnap mirror base cover.
  2. Install base cover. Connect mirror electrical connector. Center bottom of mirror to lower part of support. Rock mirror from side to side while pushing upward firmly. When mirror is fully seated, a click should be heard.

Removal & Installation (Century, Grand Prix & Regal)

Remove wiring harness cover from lighted rearview mirror, if equipped. Using small flat-blade tool, remove rearview mirror from support. Disconnect electrical connector, if equipped. To install, reverse removal procedure.

Removal (Aurora, Bonneville, DeVille, Eighty Eight, Eldorado, LeSabre, LSS, Park Avenue, Riviera & Seville)

Disconnect electrical connector from mirror. Adjust mirror to full DOWN position. Grasp mirror with both hands at top. Rotate mirror in downward-rearward motion to remove from mounting button.

Installation

  1. Install center bottom of mirror mount against windshield at top of mounting button. Slide mount onto mounting button, keeping mount parallel to windshield. Apply downward force against mounting button as mount begins to grip button. An audible click will be heard when installation is complete. Adjust mirror in a side-to-side and up and down motion to ensure mirror is securely attached. Reconnect electrical connector.
  2. Move sensitivity switch lever to MAX position. Turn ignition off. In a low ambient light condition, OFF/M/C/M should be illuminated. If OFF/M/C/M is not illuminated, inspect connectors and/or wiring.
  3. On electrochromatic mirror, cover forward facing sensor on right rear of mirror back with black cloth. Hold cloth over sensor until glass starts to darken to non-reflective stage. Remove cloth. Mirror should return to clear reflective stage. Repeat procedure several times to ensure mirror operates correctly.

Removal & Installation (Sierra & Silverado)

Use flat-bladed tool to remove wire cover from mirror. Disconnect electrical connector. Loosen set screw and slide mirror off of support. To install, reverse removal procedure. Tighten mirror set screw to 18 INCH lbs. (2 N.m).

WIRING DIAGRAMS

Note. See WIRING DIAGRAMS in appropriate POWER MIRRORS article.

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