Intermittent Wiper Operation Or Blades Stop At Random
- Remove wiper fuse from fuse block and connect ammeter (0-30 amperes) across fuse block terminals. With ignition "ON" and dash switch in "LO" or minimum delay, operate washer system. Read lowest current draw, two minutes after wash cycle has been completed. If draw exceeds 6.5 amperes, see step 2)
. If draw is between 5.0-6.5 amperes, circuit breaker and brush plate in wiper should be replaced.
- Replace blade elements and repeat step 1. If draw still exceeds 6.5 amperes, see step 3)
. If draw is below 6.5 amperes, condition is corrected.
- Disconnect linkage from wiper crank arm and repeat steps 1 and 2. If lowest current draw is below 6.5 amperes, check and repair binding linkage. If draw still exceeds 6.5, remove wiper from vehicle and check armature end play, gear and/or armature binding, or for a shorted armature.
Courtesy of GENERAL MOTORS COMPANY