Wiper System/washer System GMC Jimmy Typhoon

FRONT

System is either a base system or pulse system. Both systems include low, high, and mist modes. Pulse system includes a delay function that causes the wipers to sweep once with a delay interval between sweeps. Variable resistor in wiper switch adjusts amount of current to a delay module attached to wiper motor. Delay module controls current to wiper motor.

REAR

System uses a positive park, single-speed wiper motor. In addition to ON and OFF positions, switch on instrument panel has momentary WASH and WIPE positions. Washer pump motor is located in engine compartment, inside washer fluid reservoir.

Note. Ensure WIPER fuse is okay before testing system.

Wipers Inoperative In All Modes

1. Turn ignition switch to ACC position. Check voltage at White wire terminal of wiper switch connector. (Scheme 4) If battery voltage is not present, repair open in White wire between wiper switch and fuse.
2. If battery voltage is present, check voltage at Gray wire terminal of wiper switch connector with wiper switch in LOW position, and at Purple wire with wiper switch in HIGH position. If battery voltage is not present at one or both wires, replace wiper switch.
3. If battery voltage is present at both wires, disconnect wiper motor connector. Connect fused jumper wire between battery positive terminal and Gray wire terminal of wiper motor connector. If wipers do not operate, replace delay module or wiper motor. If wipers operate, repair open in Gray or Purple wire between wiper switch and wiper motor.

Wipers Run In Low Speed Only

1. Disconnect wiper motor connector. Turn ignition switch to ACC position. Turn wiper switch to HIGH position. Check voltage at Purple wire terminal of wiper motor connector. (Scheme 4) If battery voltage is present, replace delay module or wiper motor.
2. If battery voltage is not present, check voltage at Purple wire terminal of wiper switch connector. If battery voltage is not present, replace wiper switch. If battery voltage is present, repair open in Purple wire between wiper switch and wiper motor.

Wipers Run In High Speed Only

1. Disconnect wiper motor connector. Turn ignition switch to ACC position. Turn wiper switch to LO position. Connect test light between ground and Gray wire terminal of wiper motor connector. (Scheme 4) If test light comes on, replace delay module or wiper motor.
2. If test light does not come on, connect test light between ground and Gray wire terminal of wiper switch connector. If test light does not come on, replace wiper switch. If test light comes on, repair open in Gray wire between wiper switch and wiper motor.

Wipers Will Not Park

1. Turn ignition switch to RUN position. Connect test light between ground and White wire terminal of wiper motor connector. (Scheme 4) If test light does not come on, repair open in White wire between wiper motor and 25-amp WIPER fuse.
2. If test light comes on, connect test light between ground and Orange wire terminal of wiper motor connector. If test light does not come on, replace delay module or wiper motor. If test light comes on, disconnect wiper switch connector.
3. Connect test light between ground and Orange wire terminal of wiper motor connector. If test light comes on, replace wiper switch. If test light does not comes on, repair open in Orange wire between wiper motor and wiper switch.

Wipers Will Not Shut Off

1. Disconnect wiper motor connector. Connect fused jumper wire between Orange and Gray wire terminals of wiper motor connector. (Scheme 4) Connect fused jumper wire between battery positive terminal and White wire terminal of wiper motor connector.
2. If wiper motor parks and turns off, replace wiper switch. If wiper motor does not turn off, replace delay module or wiper motor.

Washer Inoperative (Base System)

1. Disconnect washer pump motor connector. Turn ignition switch to ACC position. Connect test light between ground and Pink wire terminal of washer pump connector with WASH button pushed. (Scheme 4) If test light does not come on, go to step 3).
2. If test light comes on, connect test light between Pink and Black wire terminals of washer pump connector with WASH button pushed. If test light comes on, replace washer pump. If test light does not come on, repair open in Black wire between washer pump and ground.
3. Connect test light between ground and Pink wire terminal of wiper motor connector with WASH button pushed. If test light does not come on, replace wiper switch. If test light comes on, repair open in Pink wire between wiper motor and washer pump.

Washer Inoperative (Pulse System)

1. Disconnect washer pump motor connector. Turn ignition switch to ACC position. Connect test light between ground and Pink wire terminal of washer pump connector with WASH button pushed. (Scheme 4) If test light does not come on, go to step 3).
2. If test light comes on, connect test light between Pink and Black wire terminals of washer pump connector with WASH button pushed. If test light comes on, replace washer pump. If test light does not come on, repair open in Black wire between washer pump and ground.
3. Connect test light between ground and Gray wire terminal of wiper motor connector with WASH button pushed. If test light does not come on, replace wiper switch. If test light comes on, connect test light between ground and Orange wire terminal of wiper motor connector.
4. If test light does not come on, replace delay module or wiper motor. If test light comes on, check for open in Orange wire between wiper motor and wiper switch. If wire is okay, replace wiper switch.

Note. Ensure RADIO fuse is okay before testing.

Wiper Inoperative

1. Turn ignition switch to ACC position. Disconnect wiper switch connector. Connect test light between ground and Brown/White wire terminal of wiper switch connector. If test light does not come on, repair open in Brown/White wire between wiper switch and fuse.
2. If test light comes on, connect wiper switch connector. Turn wiper switch on. Connect test light between ground and White wire terminal of wiper switch connector. If test light does not come on, replace wiper switch. If test light comes on, connect test light between ground and White wire terminal of wiper motor connector.
3. If test light does not come on, repair open in White wire between wiper switch and wiper motor. If test light comes on, connect test light between White and Black wire terminals of wiper motor connector. If test light comes on, replace wiper motor. If test light does not come on, repair open in Black wire between wiper motor and ground.

Washer Inoperative

1. Disconnect washer pump motor connector. Turn ignition switch to ACC position. Connect test light between ground and Dark Green wire terminal of washer pump motor connector. Push and hold washer button. If test light comes on, go to next step. If test light does not come on, go to step 3).
2. Connect test light between Dark Green and Black wire terminals of washer pump motor connector. Push and hold washer button. If test light comes on, replace washer pump motor. If test light does not come on, repair open in Black wire between washer pump motor and ground.
3. Connect test light between ground and Dark Green wire terminal of wiper switch connector. Push and hold washer button. If test light does not come on, replace wiper switch. If test light comes on, repair open in Dark Green wire between wiper switch and washer pump motor.

REMOVAL & INSTALLATION

Removal & Installation (Front)

1. Disconnect negative battery cable. Remove wiper arms. (Scheme 1) Remove cowl vent grille and screen. Mark wiper motor crank arm in relation to motor shaft for reassembly reference.
2. Remove wiper motor crank arm. Disconnect wiper motor electrical connector. Remove motor mounting screws. Remove motor. To install, reverse removal procedure.

Scheme 1

Removal & Installation (Rear)

1. Disconnect battery negative cable. Remove wiper motor cover. (Scheme 2) Remove roof trim panel. Disconnect washer hose. Disconnect wiper motor electrical connector. To ease removal of wiper arm, install 1/8" drift pin through hole in wiper arm to hold detent spring. Remove wiper arm.
2. While supporting end gate glass, remove end gate glass support arm. Remove wiper motor mounting screws. Remove wiper motor/hinge bolt. Remove nuts, spacers and flat seals from wiper motor. Remove wiper motor. To install, reverse removal procedure.

Scheme 2

Remove wiper motor. See WIPER MOTOR under REMOVAL & INSTALLATION. From housing side, drill out 7 rivets holding cover to housing. Remove cover. To install, reverse removal procedure using self-tapping screws to attach cover to housing.

Removal

1. Remove wiper motor. See «WIPER MOTOR»(/gmc/jimmy-typhoon/1992-1993/remont/wiperwasher-systems/#wiper-systemwasher-system) under REMOVAL & INSTALLATION. Remove wiper motor cover. See «WIPER MOTOR COVER (FRONT)»(/gmc/jimmy-typhoon/1992-1993/remont/wiperwasher-systems/#wiper-systemwasher-system) . Remove crank gear lock nut, crank arm, shaft seal, thrust collar and washer. Push end of gear shaft through housing to remove gear assembly and washer.
2. File burr from retaining ring groove and where crank arm seats on shaft. Remove intermediate gear and washers. Drill ends off 4 rivets holding bearings and bearing straps in place. CAUTION: DO NOT let metal chips fall into wiper motor.
3. Remove screws holding brush assembly in place. Remove armature, brush and magnet as an assembly to avoid having to realign brushes.

Installation

To install, reverse removal procedure using new housing retaining ring and self-tapping screws. Position thrust pin casing with insert about 1/32" above rear of pin.

WIPER SWITCH (FRONT)

Note. Manufacturer gives wiper switch removal procedure with steering column removed from vehicle.

1. Turn steering wheel to straight-ahead position. Disconnect negative battery cable. Remove instrument panel trim cover. Disconnect shift cable from steering column shift tube lever. Remove upper pinch bolt from column intermediate shaft. Mark intermediate shaft yoke in relation to steering shaft for reassembly reference.
2. Remove steering wheel. Disconnect electrical connectors if necessary. While supporting steering column, remove bolts from steering column upper support bracket. Remove steering column.
3. Remove lock plate cover. Screw center post of Lock Plate Compressor (J-23653) onto steering shaft as far as it will go. (Scheme 3) Compress lock plate by turning center post nut clockwise.
4. Pry snap ring out of shaft groove. Discard ring. Remove lock plate compressor. Remove lock plate. Remove turn signal cancel cam. Remove upper bearing spring and thrust washer. Turn multifunction lever upward (right turn position).
5. Pull multifunction lever straight out to remove. Remove hazard warning knob. Remove turn signal switch assembly mounting screws. Pull switch assembly and wiring harness out of column. Remove wire protector. Remove buzzer switch assembly. Remove lock cylinder retaining screw.
6. Remove lock cylinder set. Remove retaining ring from upper end of steering shaft. Slide steering shaft out of column assembly. Remove dimmer switch and actuator rod. Remove ignition switch. Remove 4 screws securing gear shift bowl to column housing. Remove upper bearing retainer. Separate gear shift bowl from column housing. Remove cover for access to wiper switch. Remove wiper switch.
7. To install, reverse removal procedure using new lock plate snap ring. Tighten intermediate shaft upper pinch bolt to 30 ft. lbs. (41 N.m).

Scheme 3

WIRING DIAGRAMS

For rear wiper/washer system wiring diagram and an additional front wiper/washer system wiring diagram, see appropriate chassis wiring diagram in the WIRING DIAGRAMS Section.

Scheme 4

See also:
• WIPER MOTOR