Camaro & Firebird
- Remove wiper fuse. Connect a 30-amp or greater ammeter between fuse terminals. Turn ignition switch to RUN position and wiper/washer switch to HI position. Ensure windshield is wet. Read ammeter and record lowest reading. If reading is less than 3.5 amps or cycles between any number and zero, check: * Motor ground * Brush/Commutator condition * Circuit Breaker (should be closed) * Armature
- If reading is greater than 6.5 amps, replace wiper blades and retake current measurement. If reading is less than 6.5 amps, wiper blades problem is fixed. If reading is more than 6.5 amps, disconnect linkage from motor crank, and retake current measurement.
- If reading is less than 6.5 amps, linkage is binding. Repair as necessary. If reading is more than 6.5 amps, remove wiper motor module, and repair as necessary.