WIPER SYSTEM
Standard wipers provide high and low speed operation. Interval wipers provide an adjustable delay between individual wipe cycles. The interval governor (if equipped) is part of the combination switch.
WIPERS INOPERATIVE
- Ensure WIPER fuse is okay. Unplug connectors from combination switch and wiper motor. Turn ignition on. Check for battery voltage on Blue wire at wiper motor and combination switch connectors. If battery voltage exists and wipers do not work, go to next step. If battery voltage exists and wipers do not park, replace wiper motor. If battery voltage does not exist, repair Blue wire.
- Turn ignition off. Unplug 14-pin connector from combination switch. (Scheme 4) Measure resistance between switch terminals for each pair of wires, at switch positions specified. See FRONT WIPER SWITCH CONTINUITY table. If resistance is less than 5 ohms for each measurement, go to next step. Replace switch if resistance is not as specified.
- Inspect all harness wiring for continuity and shorts. See WIRING DIAGRAMS. Check Black wire for continuity between motor case and ground. Repair as necessary. If wiring and switch are okay, replace motor.
Scheme 4
| Position | Terminals |
|---|---|
| OFF | Blue/Black & Blue/White |
| INT | Blue/Black & Blue/White |
| LO | Blue & Blue/White |
| HI | Blue & Red |
| MIST | Blue & Red |
| WASH | Blue & Blue Orange |
FRONT WIPER SWITCH CONTINUITY
WIPERS INOPERATIVE AT HIGH SPEED
- Perform step 2) of WIPERS INOPERATIVE. Replace switch if it is defective.
- Unplug wiper motor connector. Turn ignition on. Check for battery voltage at Red wire on connector. If battery voltage exists, replace wiper motor. If battery voltage does not exist, repair Red wire between switch and motor.
WIPERS INOPERATIVE AT LOW SPEED
- Perform step 2) of WIPERS INOPERATIVE. Replace switch if it is defective.
- Unplug wiper motor connector. Turn ignition on. Check for battery voltage at Blue/White wire on connector. If battery voltage exists, replace wiper motor. If battery voltage does not exist, repair Blue/White wire between switch and motor.
WIPERS INOPERATIVE AT INTERVAL SETTING
Perform WIPER MOTOR TEST. If wiper motor is okay, replace windshield wiper switch.
WIPERS DO NOT PARK BELOW GLASS
- Unplug wiper motor connector. Turn ignition on. Check for battery voltage at Blue wire on connector. If battery voltage exists, replace wiper motor. If battery voltage does not exist, repair Blue wire between switch and motor. Perform WIPER MOTOR TEST.
- Turn ignition off. Unplug 14-pin harness connector from combination switch. Measure resistance of Blue/Black wire between wiper motor and wiper switch. If resistance is not less than 5 ohms, repair open Blue/Black wire.
- Measure insulation resistance of Blue/Black wire to ground. If resistance is not greater than 10,000 ohms, repair shorted Blue/Black wire.
WIPERS DO NOT TURN OFF
Perform step 2) of WIPERS INOPERATIVE. Replace switch if it is defective. If switch is okay, repair short to voltage on Red or Red/White wire between switch and wiper motor.