Camaro V8-305 5.0L VIN E TBI (1989)
Intermittent Wiper Operation In Pulse, LO Or HI Modes
1.
Remove wiper fuse and connect a 0-30 amp ammeter across fuse block terminals, then operate wiper in LO and observe lowest current draw while
wiper is running on dry glass. (Current draw will fluctuate).
2.
If lowest current draw is less than 3.5 amps, proceed as follows:
a. Check motor grounds.
b. Check brush plate assembly for restricted brush to commutator contact.
c. Check circuit breaker for intermittent open.
d. Check armature for open circuit.
3.
If lowest current draw exceeds 6.5 amps, replace wiper blade elements and repeat test.
4.
If lowest current draw still exceeds 6.5 amps, disconnect wiper linkage from wiper motor crank arm and repeat test.
5.
If lowest current draw is now less than 6.5 amps, replace or repair wiper transmission (linkage) as necessary.
6.
If lowest current draw still exceeds 6.5 amps, replace wiper motor.
Wiper Will Not Park
1.
Turn ignition on and wiper off and probe harness terminal No. 2.
2.
If light illuminates, refer to wiper switch continuity test.
3.
If light does not illuminate, remove wiper cover, reconnect motor without cover, switch motor from LO to OFF and check whether park switch
latch arm is in position to catch drive pawl.
4.
If arm is not in proper position, replace park switch or, on pulse models, the cover assembly.
5.
If arm is in proper position, check whether drive pawl is bent.
6.
If drive pawl is bent, replace it. Otherwise, check shaft endplay. If drive pawl overrides latch, replace shaft assembly.
No Delay Or Continuous In Delay (Motor Operates In LO & HI)
1.
With voltmeter connected to terminal No. 6 and grounded at motor case, vary delay mode from minimum delay time to maximum delay time.
Voltage should vary from maximum to minimum.
2.
If voltage does not vary, refer to wiper switch continuity test.
3.
If voltage varies, turn ignition switch on and set wiper switch on minimum delay, then connect test light lead to ground at wiper motor case and
probe harness terminal No. 2.
4.
If light does not illuminate, refer to wiper switch continuity test.
5.
If light illuminates, remove cover and check whether park switch pulse terminals are touching pads on circuit board. If so, replace cover.
Otherwise, replace spring contacts.
No LO Mode
1.
With wiper switch on LO, connect test light lead to ground at wiper motor case and probe harness terminal No. 2.
2.
If light does not illuminate, locate and repair open from wiper switch to motor.
3.
If light illuminates, probe harness terminal No. 3.
4.
If light does not illuminate, locate and repair open circuit from switch to motor.
5.
If light illuminates, reconnect harness plug to cover and probe harness terminal No. 8.
6.
If light illuminates, check armature, circuit breaker, circuit breaker ground and brushes.
7.
If light does not illuminate, locate and repair open between terminal Nos. 1 and 8 in wiring harness.
8.
If there is continuity between terminal Nos. 1 and 8, check continuity between terminal Nos. 1 and 3 of park switch.
9.
If there is no continuity between terminal Nos. 1 and 3, replace park switch.
No HI Mode Or Blades Cycle In & Out Of Park With Switch In HI
1.
With dash switch on HI, connect test light lead to ground and probe harness terminal No. 9.
2.
If light does not illuminate, locate and repair open in circuit from wiper switch to motor.
3.
If light illuminates, check continuity between terminal Nos. 2 and 3.
4.
If there is no continuity, refer to wiper switch continuity test.
5.
If there is continuity, check for continuity between terminal Nos. 1 and 8.
6.
If there is no continuity, locate and repair open between terminal Nos. 1 and 8 in wiring harness.
7.
If there is continuity, check armature, circuit breaker, circuit breaker ground and brushes.
Blades Cycle In & Out Of Park Position When Wiper Is Off
1.
Check whether motor operates in LO.
2.
If not, refer to No LO Mode.
3.
If motor operates in LO, replace park switch. Problem may also be caused by bent drive pawl or excessive output shaft endplay.
