GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC P42 Commercial Chassis 🢒 Body and Accessories 🢒 Wipers/Washer Systems 🢒 Washers Always On

Washers Always On P32 W/Pulse

Step

Action

Value(s)

Yes

No

1
  1. Turn the ignition switch to the RUN position.
  2. Disconnect the wiper/washer switch connector from the windshield wiper pulse control module.

Does the washer pump continue to operate?

--

Go to Step 3

Go to Step 2

2

Replace the wiper/washer switch. Refer to Windshield Wiper and Washer Switch Assembly - Disassemble - Off Vehicle in Steering Wheel and Column-Tilt.

Is the repair complete?

--

System OK

--

3
  1. Turn the ignition switch to the OFF position.
  2. Disconnect the wiper/washer wire harness from the windshield wiper pulse control module.
  3. Turn the ignition switch to the RUN position.

Does the washer pump stop operating?

--

Go to Step 4

Go to Step 5

4

Replace the pulse wiper control module.

Is the repair complete?

--

System OK

--

5

Repair the short to ground in CKT 94 (PNK) between the pulse wiper control module connector, cavity B and the wiper/washer body builder provision connector.

Is the repair complete?

--

System OK

--

Washers Always On P42

Step

Action

Value(s)

Yes

No

1
  1. Turn the ignition switch to the RUN position.
  2. Disconnect the windshield wiper and washer switch pigtail connector.

Does the washer pump continue to operate?

--

Go to Step 2

Go to Step 3

2

Repair the short to B + in CKT 94 (PNK) between the windshield wiper and washer switch and the provisions for wiper/washer motor connector C 207, cavity B.

Is the repair complete?

--

System OK

--

3

Replace the windshield wiper and washer switch.

Is the repair complete?

--

System OK

--