GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2001 🢒 Jimmy - 4WD 🢒 Body and Accessories 🢒 Wipers/Washer Systems 🢒 Headlamp Washers Inoperative

Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

  1. Tests the operation of the headlamp washer pump relay and circuits. If the test lamp illuminates for a few seconds the washer pump is faulty.

    2.

  2. Tests the battery positive voltage supply circuit to the headlamp washer pump relay.

    3.

  3. Tests the washer pump control circuit to the headlamp washer pump relay.

    4.

  4. Tests the front park lamp supply circuit to the headlamp washer pump relay.

Step

Action

Yes

No

Schematic Reference: Wiper/Washer Schematics

DEFINITION: The headlamp washers are inoperative, the windshield washers, and front park lamps operate normal.

1

Did you review the Headlamp Washer System Description and Operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - Wiper/Washer Systems

2
  1. Turn the ignition on.
  2. Turn the headlamps on.
  3. Press the windshield washer switch.

Do the headlamp washers operate normal?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

3

  1. Disconnect the headlamp washer pump connector.
  2. Connect a test lamp across the harness connector terminals.
  3. Turn the ignition on.
  4. Turn the headlamps on.
  5. Press the windshield washer switch.

Does the test lamp illuminate?

Go to Step 14

Go to Step 4

4

  1. Disconnect the headlamp washer pump relay.
  2. Connect a test lamp from the battery positive voltage supply circuit terminal to ground.

Does the test lamp illuminate?

Go to Step 5

Go to Step 10

5

  1. Connect a test lamp from the windshield washer pump control circuit terminal to ground.
  2. Turn the ignition on.
  3. Press the windshield washer switch.

Does the test lamp illuminate?

Go to Step 6

Go to Step 11

6

  1. Connect a test lamp from the front park lamp supply circuit terminal to ground.
  2. Turn the headlamp switch on.

Does the test lamp illuminate?

Go to Step 7

Go to Step 12

7

Connect a test lamp from battery positive voltage to the headlamp washer pump relay ground circuit terminal.

Does the test lamp illuminate?

Go to Step 8

Go to Step 13

8

Test and repair the headlamp washer pump supply circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs or Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 16

Go to Step 9

9

Test and repair the headlamp washer pump ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs or Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 16

Go to Step 15

10

Repair the open or high resistance in the headlamp washer pump relay battery positive voltage supply circuit. Refer to Wiring Repairs and Connector Repairs in Wiring Systems.

Is the repair complete?

Go to Step 16

--

11

Repair the windshield washer pump control circuit for an open or high resistance. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Is the repair complete?

Go to Step 16

--

12

Repair the front park lamp supply circuit for an open or high resistance. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 16

--

13

Repair the headlamp washer pump relay ground circuit for an open or high resistance. Refer to Wiring Repairs or Connector Repairs in Wiring Systems.

Is the repair complete?

Go to Step 16

--

14

Replace the headlamp washer pump. Refer to Washer Pump/Reservoir Replacement .

Is the repair complete?

Go to Step 16

--

15

Replace the headlamp washer pump relay.

Is the repair complete?

Go to Step 16

--

16

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3