Motor Will Not Operate In Some or All Switch Positions

1. Check fuse No. 15 in fuse block:
a. If fuse is OK proceed to next step.
b. If fuse is bad, replace, then check wiper functions in all switch positions. If fuse blows again, proceed to voltmeter test step below.
c. If replaced fuse does not blow and motor does not run, proceed to next step.

Fig.7 Wiper Motor Connector:

2. Disconnect motor connector, and perform the following tests:
a. Connect jumper wire from battery negative terminal to motor ground strap.
b. Connect jumper wire from battery positive terminal to pin two of connector, then move jumper wire from battery positive terminal to pin one of connector.

Fig.8 Wiper System Wiring Diagram (Part 1 of 2):

Fig.8 Wiper System Wiring Diagram (Part 2 of 2):

c. If motor runs OK check wiring circuits. Check wiper switch.
d. If motor does not run proceed to next step.
3. Using a suitable ohmmeter check ground strap at motor:
a. If ground strap is OK, replace motor.
b. If not OK, repair ground as necessary.
4. Using a suitable voltmeter, with wiper switch connected:

Fig.9 Wiper Switch Tests:

a. Connect voltmeter positive lead to terminal P1, and negative lead to motor ground.

Fig.8 Wiper System Wiring Diagram (Part 1 of 2):

Fig.8 Wiper System Wiring Diagram (Part 2 of 2):

b. If no voltage, repair wiring circuits as necessary.
c. If voltage is OK, connect voltmeter positive lead to wiper switch terminal L, then move switch to low speed position. If no voltage replace switch.
d. Repeat above test for wiper switch terminal H.
e. If all tests OK, proceed to next step.
5. Disconnect motor connector, then replace fuse fifteen in fuse block:
a. If fuse does not blow, replace motor.
b. If fuse blows, disconnect wiper switch and replace fuse fifteen in fuse block.
c. If fuse does not blow replace switch.

Fig.8 Wiper System Wiring Diagram (Part 1 of 2):

Fig.8 Wiper System Wiring Diagram (Part 2 of 2):

d. If fuse blows, check and repair wiring circuits, as necessary.