Use a voltmeter at the wiring plug for motor. If your getting power then the motor is bad. If your not getting power to motor then check wiring and switch etc.
Description and operation
NOTE:This article includes Cab and Chassis.
Windshield wipers are operated by a permanent magnet motor. Wiper functions are controlled by the Generic Electronic Module (GEM). When wiper control switch is in interval (INT) position, wipers make single sweeps, separated by adjustable-length pauses. For all interval settings except INT 1, speed dependent interval feature will automatically shorten pauses as vehicle speed increases. GEM is located on the backside of the fuse junction panel located to the lower left of the steering wheel. Fuse junction panel is accessed by removing instrument panel steering column cover.
WIPER ARM & BLADE ASSEMBLY
Remove wiper arms from pivot shafts. Turn on wipers to allow motor to operate 3 or 4 cycles, then turn wipers off. Wiper pivot shafts will be in park position.
Install arm and blade assemblies onto pivot shafts. Adjust clearance between center of wiper blade and windshield molding/cowl junction. Clearance should be 2.20" (56 mm) for driver's side, and 2.91" (74 mm) for passenger's side.
Verify customer complaint by operating system. Visually inspect for obvious signs of damage:
Power distribution box maxi-fuses:
No. 15 (30-amp)
No. 22 (50-amp)
Fuse junction panel fuses:
No. 11 (10-amp)
No. 15 (5-amp
Damaged wiring harness.
Loose or corroded connections.
Open or shorted wiring.
Washer pump hoses.
If all components are okay, go to SELF-DIAGNOSTICS.
Friday, December 19th, 2008 AT 7:27 PM