Reatta V6-231 3.8L VIN C SFI (1990)
Wiper Motor: Testing and Inspection
Non-Depressed Park
On models with pulse wipers, disconnect electrical connectors to pulse module and connect switch and motor harnesses together. If problem is
corrected, pulse module is defective.
NON-DEPRESSED PARK
Fig. 10 Permanent Magnet Non-depressed Park Type Windshield Wiper Motor. (Note: The Harness Connector May Be Labeled D-C-B-A Instead Of 1-2-3-4)
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, repair or replace motor as necessary.
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 gear mechanism is defective. Repair or replace motor as necessary.
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, replace brush holder.
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, repair or replace motor.
Motor Inoperative At Low Or High Speed
1.
Disconnect electrical connector to wiper motor.
2.
If motor operates at high speed, connect battery voltage to low speed terminal 2, Fig. 10. If motor operates at low speed, connect battery voltage to
high speed terminal 1, Fig. 10.
3.
If motor operates at affected speed, check continuity of wiring between motor and switch. If wiring is satisfactory, switch is defective.
4.
If motor fails to operate in affected speed, repair or replace motor.
Motor Operates At One Speed In Both High & Low Switch Positions
1.
Disconnect electrical connector to wiper motor and alternately connect battery voltage to motor low and high speed terminals, Fig. 10.
2.
If motor runs at both low and high speeds, check continuity of wiring between motor and wiper switch. If wiring is satisfactory, wiper switch is
