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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 108 (Wiper System/Washer System - G Series Vans) >> Testing >> Wipers Inoperative In Lo Or Delay Testing

Wipers Inoperative In Lo Or Delay Testing

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1991 GMC Vandura Special, 1991 GMC Vandura, 1991 GMC Rally Camper Special, 1991 GMC Rally, and 1991 GMC Magnavan. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition to RUN position and wiper switch to LO position. Connect a fused jumper from Gray wire at pulse wiper module connector C224 to ground. See Figure . If wiper motor runs, go to step 2). If wiper motor fails to run, check and repair open in Gray wire between wiper motor and wiper module connector. If wire is okay, replace wiper motor.
  2. Connect a fused jumper wire from Gray wire at wiper switch connector C259 to ground. If wiper motor runs, replace wiper/washer switch. If wiper motor fails to run, check and repair open in Gray wire between wiper switch connector C259 and wiper module connector C226. If wire is okay, replace wiper washer switch.
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