Town Car V8-302 5.0L (1987)
4.
If motor runs to park position and stops, check wiper switch continuity and continuity of wiring between motor and switch. Repair wiring or
replace switch as needed.
5.
If motor does not run to park position and stop, repair or replace motor.
Depressed Park Type
1.
Ensure wiper motor operates properly in low speed, then place wiper switch in off position with wiper arms in vertical position.
2.
If wipers run to depressed park position but motor does not stop, replace park switch assembly.
3.
If wiper arms jam or stall when moving to depressed park position, check wiper linkage. If linkage is satisfactory, replace output arm and
windlatch assembly.
4.
If wipers continue to operate when switch is turned off, or if wipers return to their lowest point of travel but do not depress park, check wiper
switch continuity.
5.
If switch is satisfactory on two speed systems, replace motor park switch.
6.
If switch is satisfactory on intermittent systems, proceed as follows:
a. Disconnect electrical connectors to motor and connect ohmmeter between red wire terminal in harness connector to park switch and
yellow/red wire terminal in harness connector to motor brush plate.
b. If meter indicates continuity, replace motor park switch. If meter does not indicate continuity, replace intermittent governor.
7.
If wipers stop on glass when switch is turned off, connect jumper wire between motor housing and ground.
8.
If wipers park properly, repair motor ground. If wipers do not park properly, proceed as follows:
a. Disconnect electrical connectors to motor and check for battery voltage at green wire terminal in harness connector to park switch.
b. If no voltage is present, check and repair feed circuit. If voltage is present, connect ohmmeter between black wire terminal in harness
connector to park switch and blue wire terminal in harness connector to motor brush plate.
c. If meter does not indicate continuity, repair wiring or replace wiper switch. If meter indicates continuity, connect ohmmeter between black
wire terminal on motor park switch and ground.
d. If meter does not indicate continuity, replace park switch. If meter indicates continuity, connect ohmmeter between red wire terminal in
harness connector to park switch and yellow/red wire terminal in harness connector to brush plate.
e. If meter indicates continuity, replace park switch. If meter does not indicate continuity, check wiring and wiper switch.
f.
If wiring and switch are satisfactory on intermittent systems, replace governor.
Troubleshooting
INOPERATIVE OR SLOW WIPER
1.
Binding linkage.
2.
Defective switch.
3.
Defective wiper motor.
4.
Defective wiring or circuit breaker.
5.
Inoperative governor (intermittent wiper).
WIPERS WILL NOT STOP OR WILL NOT STOP IN PARK POSITION
1.
Open or broken wire.
2.
Defective wiper motor.
3.
Defective park switch.
4.
Defective wiper switch.
NOISY WIPER SYSTEM
1.
Loose or misaligned wiper motor mounting.
2.
Improper wiper arms or blades.
3.
Loose or worn linkage.
Wiper Motor Current Draw Test
