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Home >> Chevrolet >> 1976 >> Chevette Base, Automatic Trans, Trans Mfr CD 200/M29 >> Repair and Diagnosis >> Accessories & Equipment >> Wiper/Washer Systems >> Windshield Wipers - Modified Pulse System >> Wiper System Testing >> Wiper Motor Inoperative In All Switch Positions

Wiper Motor Inoperative In All Switch Positions

  1. With ignition "ON", check for voltage at wiper motor No. 2 terminal with a test light. If lamp lights, see step 2)  . If lamp does not light, check fuse at fuse block. If fuse is not blown, repair open circuit between fuse block and No. 2 terminal. If fuse is blown, disconnect wires at terminal No's. 1, 2, 3 and replace fuse. If fuse blows again with ignition "ON", repair grounded wire between fuse block and No. 2 terminal. If fuse does not blow again, reconnect wiring and with ignition "ON" and dash switch in "LO" or "MIN" delay, check fuse. If fuse is blown, repair or replace motor as required.
  2. Place ignition in "ON" position and dash switch in "LO" or "MIN" delay. Connect test lamp between motor Black/Pink wire and ground. If lamp lights, problem is in motor. Repair or replace motor as required. If lamp does not light, turn ignition "ON", place dash switch in "LO" or "MIN" delay and connect jumper between No. 1 terminal and ground. If wiper does not run, see step 3)  . If wiper runs, check for open circuit between No. 1 terminal and dash switch, dash switch for proper ground, or dash switch for defect.
  3. Remove washer pump cover and reconnect wiring. Turn ignition "ON" and dash switch to "LO" or "MIN" delay. Connect test lamp between pulse relay Red wire terminal and ground. If lamp does not light, replace gear box relay and recheck wiper unit. If lamp comes on, turn ignition "ON" and dash switch to "LO" or "MIN". Connect jumper between pulse relay Yellow wire terminal and ground. If wiper fails to operate, replace pulse relay. If wiper runs, replace timing device.
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