Firebird V8-305 5.0L (1982)
Wiper Motor: Testing and Inspection
Round Motor
Fig. 7 Gear box relay and drive gear assembly, shown in park position. Compound wound round windshield wiper motor
Fig. 14 Connections to operate compound wound round wiper motor independent of vehicle wiring
On models with pulse wipers, refer to ``Multiplex Wiper System'' for testing procedures.
WIPER INOPERATIVE
1.
Remove washer pump to gain access to relay switch assembly.
2.
Connect 12 volt source to wiper, feed side to center terminal, ground side to gear housing, Fig. 14. Do not connect jumper to terminal 1 and 3.
3.
To determine if relay coil is open, connect test lamp to wiper terminal No. 1. Test lamp should light.
4.
Test relay switch as follows:
a. If gear mechanism is in full park position insert a small screwdriver into the switch slot (between the drive pawl and the relay latch arm) and
push relay latch arm downward and toward the relay coil in direction of the arrow, Fig. 7. Next, remove a small amount of insulation from
black lead with pink tracer and touch test lamp to exposed wire.
b. If test lamp lights but motor doesn't run, proceed to step 5.
c. If test lamp doesn't light, relay switch is defective. Cover exposed wire with tape after the test.
5.
Disassemble motor section and check the following:
a. Hung brush.
b. Solder connections at brush holders.
c. Splice joints at field coil connections to leads.
d. Open armature.
e. Circuit breaker ground connection on field lamination.
