Skylark L4-138 2.3L DOHC VIN D MFI QUAD 4 (1989)
Wiper Motor: Testing and Inspection
Wiper Inoperative
Fig. 17 Connections To Operate Compound Wound Round Wiper Motor Independent Of Vehicle Wiring
Fig. 7 Gearbox Relay And Drive Gear Assembly, Shown In Park Position. Compound Wound Round Windshield Wiper Motor
On models with pulse wipers, refer to MULTIPLEX WIPER SYSTEM for testing procedures.
1.
Remove washer pump to gain access to relay switch and terminal board assembly.
2.
Connect 12 volt source to wiper, feed side to center terminal, ground side to gear housing, Fig. 17. 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 washer pump assembly and probe
(penetrate insulation) black lead with pink tracer with 12 volt tester.
b. If test lamp lights but motor doesn't run, proceed to step 5.
c. If test lamp doesn't light, relay switch and terminal board are defective.
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.
f.
Visually inspect the circuit breaker for dirty or burned contacts or solder connections.
