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Power Mirror System Cadillac DeVille Concours I final

Mirrors 6 illustrations ~3953 words

DESCRIPTION

One mirror control switch adjusts both left (driver's side) and right (passenger's side) mirrors. Move selector switch to "L" or "R" position. Press mirror control switch in direction you want mirror to move. Some models are available with heated and memory mirrors.

Each power mirror assembly contains 2 reversible motors: an up/down motor and a left/right motor. Mirror control switch reverses polarity of motor circuit to change direction of mirror movement. Each motor contains a self-resetting circuit breaker, which opens when mirror reaches its mechanical limit of travel. On vehicles with memory seat/mirror systems, each power mirror assembly contains potentiometers that are used to determine mirror position.

PRELIMINARY INSPECTION

On outside power mirrors, check MIRROR fuse (10-amp) located in underhood fuse block. On automatic day/night mirrors, check ACC fuse (10-amp) located in rear compartment fuse block. Replace as necessary. On all systems, check for broken or partially broken wire inside insulation, which could cause system malfunction, but prove good in a continuity/voltage check with system disconnected. These circuits may be intermittent or resistive when loaded, and if possible, should be checked by monitoring voltage drop with system operational (under load). Check courtesy lights for proper operation. Check and ensure grounds are clean and tight. Check for proper installation of aftermarket electronic equipment. Correct any obvious problems before continuing testing. If problem still exists, perform power mirror system check or automatic day/night mirrors system check. See OUTSIDE MIRROR SYSTEM CHECK or AUTOMATIC DAY/NIGHT MIRRORS SYSTEM CHECK .

OUTSIDE MIRROR SYSTEM CHECK

Note. Perform this check before diagnosing symptoms. If system does not operate as specified in test step, proceed to appropriate diagnosis and testing procedure under SYSTEM TESTS unless specified otherwise.

  1. Place mirror select switch in LEFT position. Operate mirror in all directions. Left outside mirror should move as commanded.
  2. Place mirror select switch in RIGHT position. Operate mirror in all directions. Right outside mirror should move as commanded.
  3. If vehicle is equipped with memory mirrors, press MEMORY 1 button. Single beep should be heard and both mirrors should move to programmed position for position No. 1. If system does not operate as specified in this test step, go to MEMORY SYSTEMS - DEVILLE & ELDORADO article.
  4. If vehicle is equipped with memory mirrors, press MEMORY 2 button. Single beep should be heard and both mirrors should move to programmed position for position No. 2. If system does not operate as specified in this test step, go to MEMORY SYSTEMS - DEVILLE & ELDORADO article.
  5. If vehicle is equipped with memory mirrors, press EXIT button. Left seat should move to programmed position for EXIT for last programmed driver. If system does not operate as specified in this test step, go to MEMORY SYSTEMS - DEVILLE & ELDORADO article.
  6. Turn ignition on. Place shift lever into Reverse position. Right outside mirror should tilt down approximately 7 degrees or to end of travel.

AUTOMATIC DAY/NIGHT MIRRORS SYSTEM CHECK

Note. Perform this check before diagnosing symptoms. If system does not operate as specified in test step, proceed to appropriate diagnosis and testing procedure under SYSTEM TESTS unless specified otherwise.

  1. Turn ignition on. Place gear shift lever in Park position. Turn automatic day/night mirror switch to ON position. Cover ambient light sensor on windshield using a dark cloth. Shine a flashlight at the mirror. Inside mirror and left outside mirror should gradually get darker. If inside mirror and left outside mirror do not get darker, go to «AUTOMATIC DAY/NIGHT MIRROR INOPERATIVE»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__automatic-daynight-mirror-inoperative) or «OUTSIDE AUTOMATIC DAY/NIGHT MIRROR INOPERATIVE»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__outside-automatic-daynight-mirror-inoperative) under SYSTEM TESTS.
  2. With cloth over ambient light sensor and flashlight still shining at mirror, place gear shift lever in Reverse position. Inside mirror and left outside mirror should gradually lighten until clear. If inside mirror and left outside mirror do not gradually lighten, go to «AUTOMATIC DAY/NIGHT MIRROR INOPERATIVE IN REVERSE»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__automatic-daynight-mirror-inoperative-in-reverse) under SYSTEM TESTS.
  3. With cloth over ambient light sensor and flashlight still shining at mirror, place gear shift lever in Park position. Inside mirror and left outside mirror should gradually get darker. If inside mirror and left outside mirror do not get darker, go to «AUTOMATIC DAY/NIGHT MIRROR INOPERATIVE»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__automatic-daynight-mirror-inoperative) or «OUTSIDE AUTOMATIC DAY/NIGHT MIRROR INOPERATIVE»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__outside-automatic-daynight-mirror-inoperative) under SYSTEM TESTS.
  4. Remove cloth and flashlight. Inside mirror and left outside mirror should gradually lighten until clear. If inside mirror and left outside mirror do not gradually lighten, go to «AUTOMATIC DAY/NIGHT MIRROR INOPERATIVE»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__automatic-daynight-mirror-inoperative) or «OUTSIDE AUTOMATIC DAY/NIGHT MIRROR INOPERATIVE»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__outside-automatic-daynight-mirror-inoperative) under SYSTEM TESTS.

SYSTEM TESTS

CAUTIONTo prevent damage to terminals, Connector Test Adaptor Kit (J-35616-A) must be used whenever a diagnostic procedure requires checking or probing terminals.

Note. Before performing following tests, perform trouble shooting. See TROUBLE SHOOTING .

Note. The following diagnostic procedures apply to vehicles equipped WITHOUT memory systems. For memory mirror system operation testing and diagnostics, see appropriate MEMORY SYSTEMS - DEVILLE & ELDORADO article. For heated mirrors system operation testing and diagnostics, see appropriate REAR WINDOW & MIRROR DEFOGGERS article.

BOTH POWER MIRRORS INOPERATIVE

  1. If outside mirrors system check was performed, go to next step. If outside mirrors system check was not performed, go to «OUTSIDE MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__outside-mirror-system-check) under TROUBLE SHOOTING.
  2. Using DVOM, test for open in Orange wire between outside mirror switch connector terminal "E" (DeVille) or "H" (Eldorado) and MIRROR fuse (10-amp) located in underhood fuse block. See «WIRING DIAGRAMS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__wiring-diagrams) . If faulty circuit is found, go to step 5). If circuit is okay, go to next step.
  3. Using DVOM, test for open in Black wire between outside mirror switch connector terminal "D" (DeVille) or "A" (Eldorado) and ground. If faulty circuit is found, go to step 6). If circuit is okay, go to next step.
  4. Replace outside mirror switch. See «POWER MIRROR SWITCH»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. Recheck system operation.
  5. Repair open in Orange wire. Recheck system operation.
  6. Repair open in Black wire. Recheck system operation.

LEFT MIRROR INOPERATIVE (DEVILLE)

  1. If outside mirrors system check was performed, go to next step. If outside mirrors system check was not performed, go to «OUTSIDE MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__outside-mirror-system-check) under TROUBLE SHOOTING.
  2. Using DVOM, test for open in Yellow wire between outside mirror switch connector terminal "H" and splice S502 located in harness on left door. (Scheme 6) See «WIRING DIAGRAMS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__wiring-diagrams). If faulty circuit is found, go to step 4). If circuit is okay, go to next step.
  3. Replace outside mirror switch. See «POWER MIRROR SWITCH»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. Recheck system operation.
  4. Repair open in Yellow wire. Recheck system operation.

Scheme 6

Scheme 6
Scheme 6

RIGHT MIRROR INOPERATIVE (DEVILLE)

  1. If outside mirrors system check was performed, go to next step. If outside mirrors system check was not performed, go to «OUTSIDE MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__outside-mirror-system-check) under TROUBLE SHOOTING.
  2. Using DVOM, test for open in Brown/White wire between outside mirror switch connector terminal "H" and splice S502 located approximately 4" (10 cm) from right door opening for door harness to pass through. See «WIRING DIAGRAMS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__wiring-diagrams) . If faulty circuit is found, go to step 4). If circuit is okay, go to next step.
  3. Replace outside mirror switch. See «POWER MIRROR SWITCH»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. Recheck system operation.
  4. Repair open in Brown/White wire. Recheck system operation.

DeVille

  1. If outside mirrors system check was performed, go to next step. If outside mirrors system check was not performed, go to «OUTSIDE MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__outside-mirror-system-check) under TROUBLE SHOOTING.
  2. Using DVOM, test for open in White wire between outside mirror switch connector terminal "G" and left outside mirror connector terminal "B". See «WIRING DIAGRAMS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__wiring-diagrams). If faulty circuit is found, go to step 7). If circuit is okay, go to next step.
  3. Using DVOM, test for open in Yellow wire between left outside mirror connector terminal "A" and splice S502 located in harness on left door. (Scheme 6) If faulty circuit is found, go to step 8). If circuit is okay, go to next step.
  4. Test outside mirror switch. See «WIRING DIAGRAMS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__wiring-diagrams). If switch tests okay, go to step 6). If switch is faulty, go to next step.
  5. Replace outside mirror switch. See «POWER MIRROR SWITCH»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. Recheck system operation.
  6. Replace left outside mirror assembly. See «POWER MIRROR ASSEMBLY»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. Recheck system operation.
  7. Repair open in White wire. Recheck system operation.
  8. Repair open in Yellow wire. Recheck system operation.

Eldorado

  1. If outside mirrors system check was performed, go to next step. If outside mirrors system check was not performed, go to «OUTSIDE MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__outside-mirror-system-check) under TROUBLE SHOOTING.
  2. Using DVOM, test for open in White wire between outside mirror switch connector terminal "D" and left outside mirror connector terminal "B". See «WIRING DIAGRAMS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__wiring-diagrams). If faulty circuit is found, go to step 7). If circuit is okay, go to next step.
  3. Using DVOM, test for open in Light Blue wire between left outside mirror connector terminal "A" and splice S506 located in harness on left door. (Scheme 6) If faulty circuit is found, go to step 8). If circuit is okay, go to next step.
  4. Test outside mirror switch. See «WIRING DIAGRAMS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__wiring-diagrams). If switch tests okay, go to step 6). If switch is faulty, go to next step.
  5. Replace outside mirror switch. See «POWER MIRROR SWITCH»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. Recheck system operation.
  6. Replace left outside mirror assembly. See «POWER MIRROR ASSEMBLY»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. Recheck system operation.
  7. Repair open in White wire. Recheck system operation.
  8. Repair open in Light Blue wire. Recheck system operation.
  1. If outside mirrors system check was performed, go to next step. If outside mirrors system check was not performed, go to «OUTSIDE MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__outside-mirror-system-check) under TROUBLE SHOOTING.
  2. Using DVOM, test for open in Light Green wire between outside mirror switch connector terminal "F" and left outside mirror connector terminal "C". See «WIRING DIAGRAMS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__wiring-diagrams). If faulty circuit is found, go to step 7). If circuit is okay, go to next step.
  3. Using DVOM, test for open in Yellow wire between left outside mirror connector terminal "D" and splice S502 located in harness on left door. (Scheme 6) If faulty circuit is found, go to step 8). If circuit is okay, go to next step.
  4. Test outside mirror switch. See «WIRING DIAGRAMS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__wiring-diagrams). If switch tests okay, go to step 6). If switch is faulty, go to next step.
  5. Replace outside mirror switch. See «POWER MIRROR SWITCH»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. Recheck system operation.
  6. Replace left outside mirror assembly. See «POWER MIRROR ASSEMBLY»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. Recheck system operation.
  7. Repair open in Light Green wire. Recheck system operation.
  8. Repair open in Yellow wire. Recheck system operation.
  1. If outside mirrors system check was performed, go to next step. If outside mirrors system check was not performed, go to «OUTSIDE MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__outside-mirror-system-check) under TROUBLE SHOOTING.
  2. Using DVOM, test for open in Light Green wire between outside mirror switch connector terminal "E" and left outside mirror connector terminal "C". See «WIRING DIAGRAMS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__wiring-diagrams). If faulty circuit is found, go to step 7). If circuit is okay, go to next step.
  3. Using DVOM, test for open in Yellow wire between left outside mirror connector terminal "D" and splice S502 located in harness on left door. (Scheme 6) If faulty circuit is found, go to step 8). If circuit is okay, go to next step.
  4. Test outside mirror switch. See «WIRING DIAGRAMS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__wiring-diagrams). If switch tests okay, go to step 6). If switch is faulty, go to next step.
  5. Replace outside mirror switch. See «POWER MIRROR SWITCH»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. Recheck system operation.
  6. Replace left outside mirror assembly. See «POWER MIRROR ASSEMBLY»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. Recheck system operation.
  7. Repair open in Light Green wire. Recheck system operation.
  8. Repair open in Yellow wire. Recheck system operation.
  1. If outside mirrors system check was performed, go to next step. If outside mirrors system check was not performed, go to «OUTSIDE MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__outside-mirror-system-check) under TROUBLE SHOOTING.
  2. Using DVOM, test for open in Red/White wire between outside mirror switch connector terminal "A" and right outside mirror connector terminal "B". See «WIRING DIAGRAMS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__wiring-diagrams) . If faulty circuit is found, go to step 7). If circuit is okay, go to next step.
  3. Using DVOM, test for open in Brown/White wire between outside mirror connector terminal "A" and splice S600 located approximately 4" (10 cm) from right door opening for door harness to pass through. If faulty circuit is found, go to step 8). If circuit is okay, go to next step.
  4. Test outside mirror switch. See «WIRING DIAGRAMS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__wiring-diagrams) . If switch tests okay, go to step 6). If switch is faulty, go to next step.
  5. Replace outside mirror switch. See «POWER MIRROR SWITCH»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. Recheck system operation.
  6. Replace right outside mirror assembly. See «POWER MIRROR ASSEMBLY»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. Recheck system operation.
  7. Repair open in Red/White wire. Recheck system operation.
  8. Repair open in Brown/White wire. Recheck system operation.
  1. If outside mirrors system check was performed, go to next step. If outside mirrors system check was not performed, go to «OUTSIDE MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__outside-mirror-system-check) under TROUBLE SHOOTING.
  2. Using DVOM, test for open in Purple/White wire between outside mirror switch connector terminal "F" and right outside mirror connector terminal "C". See «WIRING DIAGRAMS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__wiring-diagrams). If faulty circuit is found, go to step 7). If circuit is okay, go to next step.
  3. Using DVOM, test for open in Light Blue wire between right outside mirror connector terminal "A" and splice S506 located in harness on left door. (Scheme 6) If faulty circuit is found, go to step 8). If circuit is okay, go to next step.
  4. Test outside mirror switch. See «WIRING DIAGRAMS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__wiring-diagrams). If switch tests okay, go to step 6). If switch is faulty, go to next step.
  5. Replace outside mirror switch. See «POWER MIRROR SWITCH»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. Recheck system operation.
  6. Replace right outside mirror assembly. See «POWER MIRROR ASSEMBLY»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. Recheck system operation.
  7. Repair open in Purple/White wire. Recheck system operation.
  8. Repair open in Light Blue wire. Recheck system operation.
  1. If outside mirrors system check was performed, go to next step. If outside mirrors system check was not performed, go to «OUTSIDE MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__outside-mirror-system-check) under TROUBLE SHOOTING.
  2. Using DVOM, test for open in Purple/White wire between outside mirror switch connector terminal "B" and right outside mirror connector terminal "C". See «WIRING DIAGRAMS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__wiring-diagrams) . If faulty circuit is found, go to step 7). If circuit is okay, go to next step.
  3. Using DVOM, test for open in Brown/White wire between outside mirror connector terminal "D" and splice S600 located approximately 4" (10 cm) from right door opening for door harness to pass through. If faulty circuit is found, go to step 8). If circuit is okay, go to next step.
  4. Test outside mirror switch. See «WIRING DIAGRAMS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__wiring-diagrams) . If switch tests okay, go to step 6). If switch is faulty, go to next step.
  5. Replace outside mirror switch. See «POWER MIRROR SWITCH»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. Recheck system operation.
  6. Replace right outside mirror assembly. See «POWER MIRROR ASSEMBLY»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. Recheck system operation.
  7. Repair open in Purple/White wire. Recheck system operation.
  8. Repair open in Brown/White wire. Recheck system operation.
  1. If outside mirrors system check was performed, go to next step. If outside mirrors system check was not performed, go to «OUTSIDE MIRROR SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__outside-mirror-system-check) under TROUBLE SHOOTING.
  2. Using DVOM, test for open in Red/White wire between outside mirror switch connector terminal "G" and right outside mirror connector terminal "B". See «WIRING DIAGRAMS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__wiring-diagrams). If faulty circuit is found, go to step 7). If circuit is okay, go to next step.
  3. Using DVOM, test for open in Yellow wire between right outside mirror connector terminal "D" and splice S502 located in harness on left door. (Scheme 6) If faulty circuit is found, go to step 8). If circuit is okay, go to next step.
  4. Test outside mirror switch. See «WIRING DIAGRAMS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__wiring-diagrams). If switch tests okay, go to step 6). If switch is faulty, go to next step.
  5. Replace outside mirror switch. See «POWER MIRROR SWITCH»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. Recheck system operation.
  6. Replace right outside mirror assembly. See «POWER MIRROR ASSEMBLY»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. Recheck system operation.
  7. Repair open in Red/White wire. Recheck system operation.
  8. Repair open in Yellow wire. Recheck system operation.

AUTOMATIC DAY/NIGHT MIRROR INOPERATIVE

  1. If automatic day/night mirrors system check was performed, go to next step. If automatic day/night mirrors system check was not performed, go to «AUTOMATIC DAY/NIGHT MIRRORS SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__automatic-daynight-mirrors-system-check) under TROUBLE SHOOTING.
  2. Disconnect inside rear view mirror connector. Turn ignition on. Using DVOM, measure voltage between inside rear view mirror connector terminal No. 1 (Yellow wire) and ground. If battery voltage is indicated, go to next step. If battery voltage is not indicated, go to step 5).
  3. Using DVOM, measure voltage between inside rear view mirror connector terminals No. 1 (Yellow wire) and No. 2 (Black wire). If battery voltage is indicated, go to next step. If battery voltage is not indicated, go to step 6).
  4. Replace inside rear view mirror assembly. See «INSIDE REAR VIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. After repairs, recheck system operation.
  5. Repair open or short to ground in Yellow wire between mirror and rear compartment fuse block ACC fuse (10-amp). After repairs, recheck system operation.
  6. Repair open in Black wire between mirror and ground. After repairs, recheck system operation.

AUTOMATIC DAY/NIGHT MIRROR INOPERATIVE IN REVERSE

  1. If automatic day/night mirrors system check was performed, go to next step. If automatic day/night mirrors system check was not performed, go to «AUTOMATIC DAY/NIGHT MIRRORS SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__automatic-daynight-mirrors-system-check) under TROUBLE SHOOTING.
  2. Verify operation of reverse lights. Set parking brake, turn ignition on, engine off and place gear shift lever in Reverse position. If reverse light operate properly, go to next step. If reverse lights do not operate properly, go to appropriate wiring diagram in EXTERIOR LIGHTS article in WIRING DIAGRAMS.
  3. Disconnect inside rear view mirror connector. Turn ignition on. Using DVOM, measure voltage between inside rear view mirror connector terminal No. 3 (Light Green wire) and ground. If battery voltage is indicated, go to next step. If battery voltage is not indicated, go to step 5).
  4. Replace inside rear view mirror assembly. See «INSIDE REAR VIEW MIRROR»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. After repairs, recheck system operation.
  5. Repair open in Light Green wire between mirror and splice S414 located above left rear wheelwell. (Scheme 7) After repairs, recheck system operation.

Scheme 7

Scheme 7
Scheme 7

OUTSIDE AUTOMATIC DAY/NIGHT MIRROR INOPERATIVE

  1. If automatic day/night mirrors system check was performed, go to next step. If automatic day/night mirrors system check was not performed, go to «AUTOMATIC DAY/NIGHT MIRRORS SYSTEM CHECK»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__automatic-daynight-mirrors-system-check) under TROUBLE SHOOTING.
  2. Disconnect inside rear view mirror connector. Disconnect left outside rear view mirror connector. Using DVOM, measure resistance between inside rear view mirror connector terminal No. 4 (Gray wire) and left outside rear view mirror connector terminal "A" (Gray wire, without memory) or "E" (Gray/Black wire, with memory). See «WIRING DIAGRAMS»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system__wiring-diagrams) . If reading is greater than 2 ohms, go to step 6). If reading is less than 2 ohms, go to next step.
  3. Using DVOM, measure resistance in Pink/Black wire (at inside rear view mirror) and Pink wire (at outside mirror) between inside rear view mirror connector terminal No. 5 and left outside rear view mirror connector terminal "B" (without memory) or "F" (with memory). If reading is greater than 2 ohms, go to step 7). If reading is less than 2 ohms, go to next step.
  4. Using DVOM, measure resistance between inside rear view mirror connector terminals No. 4 (Gray wire) and No. 5 (Pink/Black wire). If reading is greater than 5 ohms, go to next step. If reading is less than 5 ohms, go to step 8).
  5. Replace left outside mirror assembly. See «POWER MIRROR ASSEMBLY»(/cadillac/deville-concours/i-final-1999-1999/remont/mirrors/#power-mirror-system) under REMOVAL & INSTALLATION. After repairs, recheck system operation.
  6. Repair open in Gray and/or Gray/Black wire. After repairs, recheck system operation.
  7. Repair open in Pink and/or Pink/Black wire. After repairs, recheck system operation.
  8. Repair short between Gray and/or Gray/Black wire and Pink and/or Pink/Black wire. After repairs, recheck system operation.

REMOVAL & INSTALLATION

CAUTIONWhen battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery.
CAUTIONOn some models, momentary actuation of power window switch can cause window to move directly to fully open position. When working inside door, leave ignition switch in OFF position whenever possible.

Disconnect rear view mirror connector. Grasp the mirror with both hands and rotate the mirror in a downward, rearward motion to remove from button. To install, place mirror mount at top of button and slide down making sure to keep mount parallel to windshield. Press downward evenly until mirror mount snaps into place on button. An audible "click" will be heard. Reconnect electrical connector. Recheck operation of mirror. See AUTOMATIC DAY/NIGHT MIRRORS SYSTEM CHECK under TROUBLE SHOOTING.

Power mirror switch is part of master power window switch located in left front door panel arm rest, and must be replaced as one unit. Using tape, cover front of switch and rear of door upholstery to prevent damage. Using a thin-blade screwdriver, pry between switch and door panel for spring clip. On DeVille, clip is at front of switch. On Eldorado, clip is at rear of switch. On all models, press down on clip to release switch and pry outward. Disconnect electrical connector and remove switch. To install, reverse removal procedure.

Removal (Except Electrochromic Mirror)

Disconnect negative battery cable. Pull mirror and backing plate assembly out of mirror housing. (Scheme 8) Remove jack screws from mirror backing plate. If equipped with left power mirror defogger, disconnect electrical connectors.

Installation

Snap jack screws into NEW mirror backing plate. Align jack screws into power drive unit. Push mirror in close to power drive unit. Align swivel on power drive unit to pivot points in mirror backing plate and push in until click is heard. Check mirror operation.

Removal (Electrochromic Mirror)

Disconnect negative battery cable. Pull mirror and backing plate assembly out of mirror housing. Disconnect electrical connectors. Remove actuator shafts from mirror backing plate.

  1. Snap actuator shaft into power drive unit. Ensure springs on actuator shafts are not pushed down on shafts, but seated in groove provided. Rotate actuator shafts to align ears with corresponding slots in back side of mirror face
  2. Align jack screws to drive unit and align drive unit swivel to pivot points on mirror backing plate. Using 2-inch by 3-inch block of wood, push center of mirror and backing plate assembly into housing until assembly clicks into place.
  3. Tilt mirror towards upper actuator shaft and apply pressure on block until ratchet sound stops. Tilt mirror toward outside actuator shaft and apply pressure until ratchet sound stops. Check mirror operation. If not operating properly, recheck actuator shaft alignment.

Scheme 8

Scheme 8
Scheme 8

Removal & Installation (DeVille)

Deactivate air bag system before performing any service operation. See appropriate AIR BAG RESTRAINT SYSTEMS article. Remove switch plate. See POWER MIRROR SWITCH . Insert a flat-blade tool behind door bezel to disengage 3 retaining clips. Pull up and out on bezel to release tabs at bottom of trim plate. Remove plate. Gently pull inward to disengage trim fastener retaining outside mirror trim cover. Remove 2 screws from door panel. Remove door panel by lifting up and out. Disconnect electrical connectors. Remove water deflector. Disconnect electrical connector from mirror. Remove wiring harness from retaining clip. Remove 3 mirror retaining nuts. Remove mirror from door. To install, reverse removal procedure.

Removal & Installation (Eldorado)

Remove switch plate. See POWER MIRROR SWITCH . Remove screw in switch plate opening. Insert flat-blade tool between upper rear corner of carpet attached to door trim panel. Disengage fastener and fold back carpet. Gently pull inward to disengage trim fastener retaining outside mirror trim cover. Remove 2 screws from door panel. Remove door panel by lifting up and out. Disconnect electrical connectors. Remove water deflector. Disconnect electrical connector from mirror. Remove wiring harness from retaining clip. Remove 3 mirror retaining nuts. Remove mirror from door. To install, reverse removal procedure.

WIRING DIAGRAMS

Note. For memory mirror wiring diagrams, see appropriate wiring diagram in MEMORY SYSTEMS article.

Fig. 4: Power Mirror System Wiring Diagram (DeVille)
Scheme 4: Power Mirror System Wiring Diagram (DeVille)
Fig. 5: Power Mirror System Wiring Diagram (Eldorado)
Scheme 5: Power Mirror System Wiring Diagram (Eldorado)

Automatic Day/Night Mirror System Wiring Diagram (DeVille & Eldorado). Scheme 9

Scheme 9: Automatic Day/Night Mirror System Wiring Diagram (DeVille & Eldorado)
Scheme 9: Automatic Day/Night Mirror System Wiring Diagram (DeVille & Eldorado)

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