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Wiper/washer System - Front Ford Crown Victoria I

Wiper/washer Systems 4 illustrations ~1584 words

DESCRIPTION & OPERATION

All wiper/washer functions are controlled by the wiper switch and Wiper Control Module (WCM), located behind instrument panel, to left of steering column. When wiper switch is in INT (interval) position, wipe cycles are separated by adjustable intervals.

WIPER ARM ADJUSTMENT

Remove wiper arms from pivot shafts. Turn on wipers. Allow motor to cycle pivot shafts 2 or 3 times. Turn off wipers. Reinstall wiper arms in proper positions. Dimension "X" should be as specified. (Scheme 1) See WIPER BLADE ADJUSTMENT SPECIFICATIONS table.

ApplicationIn. (mm)
Driver Side0.2 to -1.3 (-5 to -33)
Passenger Side0.1 to -1.0 (-2 to -25)

WIPER BLADE ADJUSTMENT SPECIFICATIONS

Scheme 1

Scheme 1
Scheme 1

TESTING

WARNINGTo avoid injury from accidental air bag deployment, read and carefully follow all SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM procedures in the AIR BAG RESTRAINT SYSTEM article in the ACCESSORIES/SAFETY EQUIP section.
CAUTIONWiper motor contains ceramic magnets that may crack or shatter if motor is dropped or handled roughly.

WIPER MOTOR CURRENT TEST

  1. Disengage wiper arm linkage from wiper motor. Unplug connectors from wiper motor. Using fused jumper wires, connect ammeter between positive battery terminal and terminal for Yellow/Red wire on wiper motor. (Scheme 2)
  2. Connect jumper wire from ground to Dark Blue/Orange wire terminal on wiper motor. Measure low speed current. Disconnect jumper wire from Dark Blue/Orange wire terminal. Connect jumper wire from ground to White wire terminal on wiper motor. Measure high speed current. In both low and high speed tests, current should not exceed 3.5 amps.

Scheme 2

Scheme 2
Scheme 2

WIPER MOTOR PARK TEST

  1. Ignition must be on for all wiper motor park tests. With wiper system operating at low speed, turn wiper switch off when wipers are near top of windshield. Wipers should complete cycle and park. If wipers do not park properly, go to next step.
  2. Unplug wiper motor harness connectors. Check for battery voltage at Dark Green wire terminal of harness connector. If battery voltage does not exist, repair Green wire as necessary. If battery voltage exists, ensure Black wire to ground is okay.
  3. Check for continuity between Dark Blue/Orange wire and Black/Pink wire of harness connectors. If continuity exists, go to next step. If continuity does not exist, inspect for open condition in wiring, wiper switch, or WCM, located behind instrument panel, to left of steering column.
  4. Check for continuity between ground and Black/Pink wire terminal on wiper motor. If continuity does not exist, replace motor. If continuity exists, check for continuity between Yellow/Red and Red wires on connector. If continuity exists, go to next step. If continuity does not exist, check for open circuit in wiring, WCM, or wiper switch. If no continuity exists in WCM, and continuity exists between Yellow/Red and Red wire terminals of wiper switch, replace WCM.
  5. Check for continuity between terminals for Red and Dark Green wires of wiper motor. (Scheme 2) If continuity does not exist, replace wiper motor.

WIPER SWITCH TEST

Unplug multifunction switch connector, located under steering column. Using a DVOM, test between specified terminals. See WIPER SWITCH TEST table. (Scheme 3) Replace switch if readings are not as specified.

Switch PositionTerminalsResistance: k/ohms
OFF590 To 993103.3
OFF589 To 99347.6
LOW589 To 9934.08
INT589 To 99311.33
HIGH589 To 9930
WASH590 To 9930
INT (1)
MIN590 To 9933.3
MAX590 To 993103.3
(1) Rotate INT (interval) knob from minimum to maximum. Resistance should increase gradually from 3.3 k/ohms (MIN) to 103.3 k/ohms (MAX). All measurements should be within 10% of specifications.
(1)Rotate INT (interval) knob from minimum to maximum. Resistance should increase gradually from 3.3 k/ohms (MIN) to 103.3 k/ohms (MAX). All measurements should be within 10% of specifications.

WIPER SWITCH TEST

Scheme 3

Scheme 3
Scheme 3

WASHER PUMP TEST

  1. If washer does not operate, ensure reservoir is full. Operate washer switch. If washer pump is inoperative, go to next step. If washer pump operates but fluid does not squirt from nozzles, inspect pump, nozzles, and hoses for blockage. Repair as necessary. If pump squirts fluid, but wipers do not wipe, go to step 7).
  2. Turn ignition on. Check for battery voltage on Black/White wire at washer pump while operating washer switch. If battery voltage exists, go to next step. If battery voltage does not exist, go to step 4).
  3. Check washer pump ground circuit (Black wire) for continuity. If continuity does not exist, repair ground circuit. If continuity exists, replace washer pump.
  4. Check for battery voltage on Dark Green wire at Wiper Control Module (WCM), located behind instrument panel, to left of steering column. If battery voltage exists, go to next step. If battery voltage does not exist, check for open circuit breaker, Dark Green wire, or connector. Repair as necessary.
  5. Unplug WCM connector. Press and hold washer switch. Check for continuity between Brown/White and Dark Blue/White wires. If continuity exists, go to next step. If continuity does not exist, check for open circuit between wiper switch and WCM. If wiring is okay, test wiper switch. See «WIPER SWITCH TEST»(/ford/crown-victoria/i-1992-1997/remont/wiperwasher-systems/#wiperwasher-system-front__wiper-switch-test) .
  6. Reconnect wiring to WCM. Turn ignition on. Press and hold washer switch. Check for battery voltage on Dark Blue/Orange wire at WCM connector. If battery voltage does not exist, replace WCM. If battery voltage exists, repair White wire between WCM and wiper motor.
  7. Unplug wiper motor connectors. Turn ignition on. Press and release wiper switch while checking for battery voltage between Dark Blue/Orange and Yellow/Red wires at wiper motor. If battery voltage does not exist, go to next step. If battery voltage exists, measure wiper motor current. See «WIPER MOTOR CURRENT TEST»(/ford/crown-victoria/i-1992-1997/remont/wiperwasher-systems/#wiperwasher-system-front__wiper-motor-current-test) . Replace wiper motor as necessary.
  8. Press and release washer switch. Check for battery voltage between Dark Blue/Orange and Yellow/Red wires at WCM connector. If battery voltage exists, repair wiring between WCM and wiper motor. If battery voltage does not exist, replace WCM.

WIPERS INOPERATIVE

  1. Unplug wiper motor connectors. Set wiper control for high speed operation. Turn ignition on. Check for battery voltage at Dark Green wire at harness connector. If battery voltage exists, go to next step. If battery voltage does not exist, check for open wiring, defective circuit breaker, or defective switch. See «WIPER SWITCH TEST»(/ford/crown-victoria/i-1992-1997/remont/wiperwasher-systems/#wiperwasher-system-front__wiper-switch-test).
  2. Check for battery voltage at Dark Green wire at WCM harness connector, located behind instrument panel, to left of steering column. (Scheme 4) If battery voltage exists, go to next step. If battery voltage does not exist, repair open Dark Green wire to WCM.
  3. Set wiper switch for high speed operation. Check for battery voltage between Yellow/Red and White wires at wiper motor harness connector. If battery voltage does not exist, go to next step. If battery voltage exists, test wiper switch. See «WIPER SWITCH TEST»(/ford/crown-victoria/i-1992-1997/remont/wiperwasher-systems/#wiperwasher-system-front__wiper-switch-test).
  4. Check for battery voltage between Yellow/Red and White wires at WCM connector. If battery voltage does not exist, go to next step. If battery voltage exists, repair open in White or Yellow/Red wire between WCM and wiper motor.
  5. Unplug connector from WCM. Measure resistance between Brown/White and Orange wires at harness connector. If resistance is less than one ohm, replace WCM. If resistance is not less than one ohm, check for open Brown/White or Orange wire between wiper switch and WCM. If wires are okay, test wiper switch. See «WIPER SWITCH TEST»(/ford/crown-victoria/i-1992-1997/remont/wiperwasher-systems/#wiperwasher-system-front__wiper-switch-test). If switch is okay, go to next step.
  6. Perform «WIPER MOTOR CURRENT TEST»(/ford/crown-victoria/i-1992-1997/remont/wiperwasher-systems/#wiperwasher-system-front__wiper-motor-current-test). If current is okay, repair binding linkage. Replace motor if current is not as specified.

WIPERS INOPERATIVE AT LOW SPEED, HIGH SPEED OKAY

  1. Turn ignition on. Set wiper switch for low speed operation. Unplug wiper motor connector. Check for battery voltage between Yellow/Red and Dark Blue/Orange wires at connector. If battery voltage does not exist, go to next step. If battery voltage exists, check wiper motor. See «WIPER MOTOR CURRENT TEST»(/ford/crown-victoria/i-1992-1997/remont/wiperwasher-systems/#wiperwasher-system-front__wiper-motor-current-test).
  2. Check for battery voltage between Yellow/Red and Dark Blue/Orange wires at governor connector, located behind instrument panel, to left of steering column. If battery voltage does not exist, go to next step. (Scheme 4) If battery voltage exists, repair open Yellow/Red or Dark Blue/Orange wire between wiper motor and governor.
  3. Unplug connector from governor. Measure resistance between Brown/White and Orange wires at harness connector. If resistance is not 3500 - 4500 ohms, go to next step. If resistance is 3500 - 4500 ohms, replace governor.
  4. Test wiper switch. See «WIPER SWITCH TEST»(/ford/crown-victoria/i-1992-1997/remont/wiperwasher-systems/#wiperwasher-system-front__wiper-switch-test). If wiper switch is okay, repair wiring as necessary. Perform WIPER MOTOR CURRENT DRAW TEST. Replace motor if it fails test.

WIPERS INOPERATIVE AT INTERVAL SETTING

  1. Unplug connector from WCM, located behind instrument panel, to left of steering column. (Scheme 4) Set wiper switch for interval operation. Measure resistance between Brown/White and Orange wires at harness connector. If resistance is not as 10,500 - 12,000 ohms, go to next step. If resistance is 10,500 - 12,000 ohms, go to step 3).
  2. Unplug connector from wiper switch. Measure resistance between switch terminals for Brown/White and Orange wires. If resistance is 10,500 - 12,000 ohms, repair open wire between WCM and wiper switch. If resistance is not as specified, test wiper switch. See «WIPER SWITCH TEST»(/ford/crown-victoria/i-1992-1997/remont/wiperwasher-systems/#wiperwasher-system-front__wiper-switch-test).
  3. Measure resistance between Brown/White and Dark Blue/White wire terminals on harness connector while rotating interval control. If resistance does not change from 3.3/k ohms to 103.3/k ohms, go to next step. If resistance changes from 3.3/k ohms to 103.3/k ohms, replace windshield wiper WCM.
  4. Unplug connector from windshield wiper switch. Measure resistance between switch terminals Brown/White and Dark Blue/White wires while rotating interval control. If resistance changes from 3.3/k ohms to 103.3/k ohms, repair open wiring between wiper switch and WCM. If resistance does not change as specified, test wiper switch. See «WIPER SWITCH TEST»(/ford/crown-victoria/i-1992-1997/remont/wiperwasher-systems/#wiperwasher-system-front__wiper-switch-test).

REMOVAL & INSTALLATION

WARNINGTo avoid injury from accidental air bag deployment, read and carefully follow all SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM procedures in the AIR BAG RESTRAINT SYSTEM article in the ACCESSORIES/SAFETY EQUIP section.
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.

WIPER MOTOR

CAUTIONWiper motor contains ceramic magnets that may crack or shatter if motor is dropped or handled roughly.
  1. Disconnect battery ground cable. Remove rear hood seal. Remove wiper arms. Remove cowl vent screens. Unplug harness connector from motor. Remove wiper motor.
  2. Unsnap and remove wiper linkage cover. Disengage linkage from operating arm on motor by lifting locking tab and pulling clip away from shaft. Remove motor. To install, reverse removal procedure.

Disconnect battery ground cable. Separate and remove shroud halves. Unplug harness connector. Remove wiper switch. To install, reverse removal procedure.

Wiper control module is mounted behind left side of instrument panel, above warning chime module. Disconnect negative battery cable. Separate steering column cover halves. Unplug wiper switch connector. Unplug harness connector. Remove wiper control module. To install, reverse removal procedure.

Front Wiper/Washer System Wiring Diagram. Scheme 4

Scheme 4: Front Wiper/Washer System Wiring Diagram
Scheme 4: Front Wiper/Washer System Wiring Diagram