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Wiper System/washer System - Standard/pulse GMC Sonoma Syclone

Wiper/washer Systems 5 illustrations ~1747 words

DESCRIPTION

The 2 wiper/washer systems available on "S" & "T" Series include a base system and an optional system. Base system uses a low, high, and mist mode. In addition to a low, high and mist mode, the optional system uses a pulse mode. It has an additional integrated circuit board to control pulse function, as well as a rheostat (built into the switch) to control the rate of pulse.

Wiper Inoperative

  1. Check wiper fuse at box, and replace if necessary. If fuse is okay, connect voltmeter between terminal No. 93 (White wire) of connector C340 and ground. (Scheme 1)or (Scheme 2). Turn ignition to ACCY position. If battery voltage is not present, repair open circuit in White wire. If battery voltage is present, go to next step.
  2. With ignition on, turn wiper switch to LO. Connect voltmeter between terminal No. 91 (Gray wire) of connector C340 and ground. Turn wiper switch to HI. Connect voltmeter between terminal No. 92 (Purple wire) of connector C340 and ground. If battery voltage is not present at both terminals, replace wiper/washer switch. If battery voltage is present at both terminals, go to next step.
  3. Disconnect wiper motor wiring harness connector (C155). Connect fused jumper wire between terminal No. 91 (Gray wire) and battery positive terminal. If wipers operate, repair open circuit in White and/or Purple wire. If wipers do not operate, repair or replace wiper motor.

Wiper Has Low Speed Only

  1. Disconnect wiper motor wiring harness connector (C155). (Scheme 1)or (Scheme 2). Turn ignition to ACCY position. Turn wiper switch to HI. Connect test light between terminal No. 92 (Purple wire) and ground. If test light comes on, replace or repair motor. If test light does not come on, go to next step.
  2. Connect test light between terminal No. 92 (Purple wire) of switch connector C340 and ground. Turn ignition to ACCY position. Connect voltmeter between Purple wire of connector C340 and ground. If test light comes on, repair open circuit in Purple wire between wiper switch and wiper motor. If test light does not come on, repair or replace wiper switch.

Wiper Has High Speed Only

  1. Disconnect wiper motor wiring harness connector (C155). (Scheme 1)or (Scheme 2). Turn ignition to ACCY position. Turn wiper switch to LO. Connect test light between terminal No. 91 (Gray wire) and ground. If test light comes on, replace or repair motor. If test light does not come on, go to next step.
  2. Connect test light between terminal No. 91 (Gray wire) of switch connector C340 and ground. Turn ignition to ACCY position. Connect voltmeter between Purple wire of connector C340 and ground. If test light comes on, repair open circuit in Gray wire between wiper switch and wiper motor. If test light does not come on, repair or replace wiper switch.

Wipers Will Not Park

  1. Turn ignition on. Connect test light between terminal No. 93 (White wire) of wiper motor wiring harness connector (C155) and ground. (Scheme 1)or (Scheme 2). If test light does not come on, repair open circuit in White wire between wiper motor and instrument panel. If test light does come on, go to next step.
  2. Connect test light between terminal No. 98 (Orange wire) of wiper motor wiring harness connector (C155) and ground. If test light does not come on, repair or replace wiper park switch. If test light does come on, go to next step.
  3. Disconnect wiper/washer switch connector (C340). Connect test light between terminal No. 98 (Orange wire) of wiper/washer switch connector (C340) and ground. If test light does not comes on, repair open circuit in Orange wire between wiper switch and wiper motor. If test light does come on, repair or replace wiper switch.

Wiper Will Not Shut Off

  1. Disconnect wiper motor wiring harness connector (C155). (Scheme 1)or (Scheme 2). Connect fused jumper wire between terminal No. 98 (Orange wire) and terminal No. 91 (Gray wire) of wiper motor wiring harness connector (C155).
  2. Connect fused jumper wire between terminal No. 93 (White wire) and battery positive terminal. If wiper motor parks and turns off, replace wiper/washer switch. If wiper motor continues to run, repair or replace wiper motor module.

Windshield Washer Pump Inoperative (Pulse Wiper System)

  1. Disconnect windshield washer pump wiring harness connector (C154). (Scheme 1) Turn ignition to ACCY position. Turn wiper switch to WASH. Connect test light between windshield washer pump wiring harness connector (C154) terminal No. 94 (Pink wire) and ground. 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 windshield washer pump wiring harness connector (C154) terminal No. 94 (Pink wire) and terminal No. 150 (Black wire). Turn wiper switch to WASH position. If test light does not comes on, repair open circuit in Black wire from windshield washer pump to ground. If test light does come on, repair or replace windshield washer pump.
  3. Connect test light between wiper motor connector (C155) terminal No. 91 (Gray wire) and ground. Turn wiper switch to WASH position. Turn ignition to ACCY position. If test light does not come on, repair or replace wiper switch. If test light comes on, go to next step.
  4. Connect test light between wiper motor connector (C155) terminal No. 98 (Orange wire) and ground. Turn ignition to ACCY position. If test light does not come on, repair or replace wiper motor. If test light comes on, repair open circuit in Orange wire between wiper motor and switch. If wire is not open, replace wiper switch.

Windshield Washer Pump Inoperative (EXC Pulse Wiper System)

  1. Disconnect windshield washer pump wiring harness connector (C154). (Scheme 2) Turn ignition to ACCY position. Turn washer switch on. Connect test light between windshield washer pump wiring harness connector (C154) terminal No. 94 (Pink wire) and ground. 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 windshield washer pump wiring harness connector (C154) terminal No. 94 (Pink wire) and terminal No. 150 (Black wire). If test light does not comes on, repair open circuit in Black wire to ground. If test light does come on, repair or replace windshield washer pump.
  3. Connect test light between wiper/washer switch connector (C340) terminal No. 94 (Pink wire) and terminal No. 150 (Black wire). Turn wiper switch to WASH. Turn ignition to ACCY position. If test light comes on, repair open circuit in Pink wire between wiper switch and windshield washer pump. If test light does not come on, replace wiper switch.

Rear Wiper Inoperative

  1. Disconnect rear wiper switch connector (C362). (Scheme 3) Turn ignition to ACCY position. Connect test light between terminal No. 141 (Brown/White wire) and ground. If test light does not come on, check RADIO fuse. If fuse is okay, repair open circuit in Brown/White wire between wiper switch and fuse block. If test light comes on, go to next step.
  2. Connect rear wiper switch (C362). Turn wiper switch on. Connect test light between wiper switch connector terminal No. 393 (White or Orange wire) and ground. If test light does not come on, replace wiper switch. If test light does come on, go to next step.
  3. Connect test light between wiper motor wiring harness connector (C901) terminal No. 393 (White or Orange wire) and ground. If test light comes on, repair open in (White or Orange wire) between wiper motor and wiper switch. If test light does not comes on, go to next step.
  4. Connect test light between wiper motor wiring harness connector (C901) terminal No. 393 and terminal No. 150 (Black wire). If test light does not comes on, repair open in circuit 150 between wiper motor and ground. If test light comes on, repair or replace wiper motor.

Rear Windshield Washer Inoperative

  1. Disconnect windshield washer pump wiring harness connector (C162). (Scheme 3) Turn ignition to ACCY position. Connect test light between windshield washer pump wiring harness connector terminal No. 392 (Green wire) and ground. Push washer switch button on. 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 windshield washer pump wiring harness connector (C162) terminal No. 392 and terminal No. 150 (Black wire). If test light does not come on, repair open circuit in Black wire to ground. If test light does come on, repair or replace windshield washer pump.
  3. Connect test light between wiper switch connector (C362) terminal No. 392 (Green wire) and ground. Push washer switch button on. If test light comes on, repair open circuit in Green wire between wiper switch and wiper motor. If test light comes on, repair or replace wiper switch.

Scheme 1

Scheme 1
Scheme 1

Scheme 2

Scheme 2
Scheme 2

Scheme 3

Scheme 3
Scheme 3

WIPER MOTOR (FRONT)

  1. Disconnect battery negative cable. Remove wiper arms. Remove cowl vent and grille. Loosen but do not remove transmission drive link to motor crank arm attaching nuts. (Scheme 4)
  2. Detach drive link from motor crank arm. Disconnect motor electrical leads. Remove motor attaching screws. Rotate motor upward and outward to remove. To install, reverse removal procedure.

Removal

Remove wiper motor. From housing side, drill ends off 7 rivets holding cover to housing. Remove cover.

Installation

To install, reverse removal procedure. Attach cover to housing with self-tapping screws.

  1. Remove wiper motor. Remove wiper motor cover. Remove crank gear lock nut, crank arm, shaft seal, thrust collar and washer. Push end of gear shaft through housing and 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 6-point socket screws holding brush assembly in place. Remove armature, brush and magnet assembly together to avoid necessary realignment of brushes.

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

Scheme 4

Scheme 4: Installation
Scheme 4: Installation

WIPER MOTOR (REAR)

  1. Disconnect battery negative cable. Remove wiper cover retaining screws. Remove wiper motor retaining screws. Install 1/8" pin in wiper arm to hold detent spring. Remove wiper arm. (Scheme 5)
  2. Support end gate glass. Remove end gate glass support arm. Remove wiper motor hinge bolt. Remove nuts and spacers and flat seals from wiper motor. Remove wiper motor. To install, reverse removal procedure.

Scheme 5

Scheme 5
Scheme 5

WIRING DIAGRAMS

For additional information, see appropriate chassis wiring diagram in WIRING DIAGRAMS section.

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