Windshield Wiper Test 2A - Wipers Not Working At All
NOTE:
Perform WINDSHIELD WIPER TEST 1A
before proceeding with this test. For connector terminal identification, see CONNECTOR IDENTIFICATION in BODY CONTROL COMPUTER INTRODUCTION. Perform TEST VER-1A
after each repair.
CAUTION:
Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
- Using scan tool, actuate wipers in low speed mode. If wiper motor does not operate in low speed mode, go to next step. If wiper motor operates in low speed mode, go to WINDSHIELD WIPER TEST 2B.
- Using scan tool, stop wipers low speed actuation and actuate wipers in high speed mode. If wiper motor does not operate in high speed mode, stop wipers actuation and go to next step. If wiper motor operates in high speed mode, go to WINDSHIELD WIPER TEST 2B.
- Using scan tool, read intermittent wipe sensor. While observing scan tool, move wiper switch from OFF position to HI position. If scan tool displays INTRMT WIPE: with a voltage more than zero volts, go to next step. If scan tool displays INTRMT WIPE: with zero volts, go to WINDSHIELD WIPER TEST 2D .
- Locate Power Distribution Center (PDC) on left front fender. Remove and inspect wiper fuse No. 14 (40-amp). See Fig 1 . If fuse is okay, go to next step. If fuse is open, go to WINDSHIELD WIPER TEST 2C .
- Using scan tool in voltmeter mode, check voltage at cavity No. 47 for fuse No. 14. If voltage is more than 10 volts, go to next step. If voltage is less than 10 volts, repair open Red wire between battery voltage and wiper fuse No. 14.
- Reinstall wiper fuse No. 14. Disconnect intermittent wiper relay and ensure connector is clean and not damaged. Using scan tool in voltmeter mode, check voltage on intermittent wiper relay cavity No. 29 (Red/Gray wire). See Fig 1 . If voltage is more than 10 volts, go to next step. If voltage less than 10 volts, repair open in Red/Gray wire between wiper fuse No. 14 and intermittent wiper relay.
- Connect a jumper wire between intermittent wiper relay cavity No. 29 (Red/Gray wire) and cavity No. 37 (Dark Green/Violet wire). If wiper motor operates, disconnect jumper wire and go to WINDSHIELD WIPER TEST 2D . If wiper motor does not operate, go to next step.
- Disconnect wiper HI/LO relay, located in PDC. Ensure connector is clean and not damaged. Ensure jumper wire is still connected between intermittent wiper relay cavity No. 29 (Red/Gray wire) and cavity No. 37 (Dark Green/Violet wire). Using scan tool in voltmeter mode, check voltage on wiper HI/LO relay cavity No. 36 (Dark Green/Violet wire). If voltage is more than 10 volts, go to next step. If voltage is less than 10 volts, repair open in Dark Green/Violet wire between intermittent and HI/LO relays.
- Disconnect jumper wire in intermittent relay cavity. Connect a jumper wire between intermittent relay cavity No. 29 (Red/Gray wire) and wiper HI/LO relay cavity No. 11 (Brown/Orange wire). If wiper motor operates in low speed mode, replace wiper HI/LO relay. If wiper motor does not operate in low speed mode, go to WINDSHIELD WIPER TEST 2E .