Wiper Will Not Shut Off

Fig. 18 Gearbox Relay & Drive Gear Assembly Inspection:

Crank Arm Rotates 360 Degrees
1. Observe if relay latch arm spring is connected properly, Fig. 18.
2. Manually operate latch arm to check it for possible binding condition.
3. If items in 1 and 2 check out, connect power source to wiper and connect jumper wire from terminal No. 3 to wiper housing. DO NOT make any connections from terminal No. 1. Wiper motor should start to run as soon as connections are made. If this happens and wiper motor continues to run, the coil is internally grounded and the relay switch and terminal board assembly should be replaced.

Fig. 17 Connections To Operate Compound Wound Round Wiper Motor Independent Of Vehicle Wiring:

Wiper Recycles
Crank arm oscillates in a somewhat horizontal plane and is accompanied by a loud knock with each revolution of the gear.
1. Check that drive pawl and relay latch arm springs are properly connected, Fig. 18.
2. Check wiper for LO speed operation, Fig. 17. If wiper has HI speed only, check the following items:
a. Solder joint at No. 3 wiper terminal.
b. Splice joint-field coil crossover splice.
c. Splice joint-black lead to field coil.
3. Check relay switch and terminal board as follows:
a. Remove washer pump assembly to get at black with pink stripe wire. Ground 12 volt test lamp to wiper housing and probe (penetrate insulation) black with pink stripe wire with 12 volt tester.
b. Connect positive side of power source to terminal No. 2 and negative side to motor case. Install jumper wire from terminal No. 1 to motor case. Observe if test light goes out once for each revolution of gear or if light glows steadily. If light glows steadily, relay switch contacts are not opening and switch is defective. If light goes out each time drive pawl moves into relay switch slot, relay switch is functioning correctly.