S15/T15 4WD P/U L4-121 2.0L VIN Y 2-bbl (1983)
Wiper Motor: Testing and Inspection
Permanent Magnet Motor
On models with pulse wipers, disconnect electrical connectors from pulse module and connect switch and motor harnesses together. If problem is
corrected, pulse module is defective.
Fig. 10 Permanent magnet type windshield wiper motor.1982---87 S/T 10 & 15 models
1982---87 S/T 10 & 15 MODELS
Windshield Wipers Inoperative
1.
Rotate wiper switch to high speed position, then connect test lamp between motor terminal No. 1 and ground, Fig. 10.
2.
If lamp does not light, check fuse and replace if necessary. If fuse is satisfactory, check for open circuit in feed wire between motor and fuse block.
3.
If fuse is blown, check for short circuit in motor or wiring to control switch.
4.
If lamp lights, rotate wiper switch to low position and connect jumper wire between motor and ground.
5.
If motor operates, check ground circuit and repair as necessary. If motor does not operate, motor is defective.
Motor Operates But Wiper Blades Do Not
1.
Check to ensure wiper linkage is not binding and that linkage is connected to crank arm.
2.
If linkage is satisfactory, motor is defective.
Wiper Blades Stop At Random Position On Windshield
1.
Remove wiper fuse, then connect ammeter across fuse block terminals. Operate wipers on dry windshield.
2.
Ammeter reading will fluctuate. If reading remains below 5 amps, motor is defective.
3.
If reading is greater than 5 amps, disconnect wiper linkage at crank arm and perform test over. If reading is now less than 5 amps, check for
binding linkage and replace wiper blades.
4.
If lowest reading still exceeds 5 amps, motor is defective.
Fig. 10 Permanent magnet type windshield wiper motor.1982---87 S/T 10 & 15 models
