GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1997 🢒 Chevy P42 Commercial Chassis 🢒 Body and Accessories 🢒 Wipers/Washer Systems 🢒 Washers Inoperative

Windshield Washer Pump Inoperative

Step

Action

Value(s)

Yes

No

1

Check the wiper fuse.

Is a fuse blown?

--

Go to Step 2

Go to Step 3

2
  1. Check for a short circuit and repair it if necessary.
  2. Replace the fuse.

Is the repair complete?

--

System OK

--

3
  1. Ignition in ACC.
  2. Probe the positive terminal of the fuse using a grounded test lamp.

Does the test lamp illuminate?

--

Go to Step 5

Go to Step 4

4

Repair the positive circuit between the battery and the fuse.

Is the repair complete?

--

System OK

--

5
  1. Ignition in ACC.
  2. Probe the ignition + wire at the wiper/washer switch using a grounded test lamp.

Does the test lamp illuminate?

--

Go to Step 7

Go to Step 6

6

Repair the open circuit between the fuse and the wiper/washer switch.

Is the repair complete?

--

System OK

--

7
  1. Disconnect the washer pump connector.
  2. Ignition in ACC.
  3. Wiper/washer switch in WASH.
  4. Probe the PNK (94) wire at the washer pump connector using a grounded test lamp.

Does the test lamp illuminate?

--

Go to Step 9

Go to Step 8

8

Repair the open circuit between the switch and the pump.

Is the repair complete?

--

System OK

--

9
  1. Disconnect the washer pump connector.
  2. Ignition switch in ACC.
  3. Connect a test lamp to the BLK (150) wire at the washer pump as a ground.
  4. Wiper/washer switch in WASH.
  5. Probe the PNK (94) wire with the test lamp.

Does the test lamp illuminate?

--

Go to Step 11

Go to Step 10

10

Replace the washer pump.

Is the repair complete?

--

System OK

--

11

Repair the open BLK (150) ground wire.

Is the repair complete?

--

System OK

--