DESCRIPTION
Note. "R" Series are 2WD vehicles.
Wiper system consists of a 2-speed permanent magnet-type motor. Wiper motor consists of field magnets, and armature and drive gear within upper and lower housings. The washer motor is assembled on bottom of washer fluid reservoir. (Scheme 1) Wiper motor is protected by an automatic reset circuit breaker. Vehicle wiring is protected by fuse in fuse block.
Wiper Inoperative ("HI" & "LO")
- Remove wiring connector at wiper motor. With ignition on and wiper switch on "HI", connect a test light lead to ground and probe terminal No. 4. If no power exists, check fuse and feed wire from fuse block through wiper switch.
- If test light shows power, reconnect wiper motor connector, turn key on and wiper switch to "LO". Connect jumper wire from motor case to ground. If wiper runs, repair open in ground strap. If motor does not run, replace motor.
Wiper Operates ("LO" Only)
Disconnect wire harness from motor. Connect a jumper wire from battery positive to terminal No. 4. If wiper runs on "HI", repair open in No. 4 wire or replace wiper switch. If wiper does not run, replace motor.
Wiper Shuts Off (Blades Will Not Return To Park)
- Disconnect wiring harness from motor. Connect jumper wire from terminal No. 2 to terminal No. 3. Using a jumper wire, supply battery voltage to terminal No. 1.
- If wiper runs and parks, turn wiper switch off and check for continuity between terminals No. 2 and No. 3. If continuity exists, repair open in wire from terminal No. 1 to fuse block.
- If no continuity exists, repair open in wire from terminal No. 3 to wiper switch or replace switch.
Intermittent Operation ("HI" & "LO")
- Remove wiper fuse from fuse block and connect a 0-30 amp ammeter across fuse connections in block. Turn ignition on and wipers to "HI" with windshield dry. Note the lowest current draw reading.
- If current draw is less than 5 amps, replace the motor. If current draw exceeds 5 amps, replace the wiper blade elements and retest.
- If current draw is still over 5 amps, disconnect wiper linkage from wiper crank arm and retest. If current draw is OK, check and repair wiper linkage. If current draw is still over 5 amps, replace motor.
Scheme 1
- With ignition on and wiper switch on "LO", Connect a test light lead to ground and probe terminal No. 2 while pushing "WASH" button. If the test light shows no power, repair open in circuit between wiper switch and motor.
- If test light shows power, remove washer pump and connect a test light lead to ground at wiper motor case and probe positive terminal of pump connector. If light shows power, replace pump.
Removal
- Ensure wiper motor is in park position and negative battery cable is disconnected. Disconnect electrical harness at motor. Disconnect hoses at washer pump. Reach through access hole in cowl grille and loosen wiper drive rod attaching screws.
- Remove drive rod from wiper motor crank arm. Remove screws attaching wiper motor to instrument panel and remove motor assembly.
Installation
To install, reverse removal procedure. Lubricate crank arm pivot prior to installation.
OVERHAUL
Repairs to motor/gear box section of wiper assembly are limited to switch, armature, cap and brush holder assembly, plus external parts, crankarm, spacer and seal (plastic) and output shaft seal.