For 1990-2009 cars

### Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. This step tests the integrity of the control circuit of the headlamp washer motor. If the fuse in the jumper wire opens when you perform this test, a short to ground may have occurred.

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Wiper/Washer Schematics Connector End View Reference: Wiper/Washer Connector End Views DEFINITION: Headlamp Washer Inoperative. The windshield washers and headlamps operate normally. The CHECK WASHER FLUID message is not displayed.
1 | Have you conducted Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 |

1. Turn ON the ignition, with the engine OFF.
2. Turn the headlamps ON.
3. Press the windshield washer switch 4 times.

Do the headlamp washers operate after the fourth press of the windshield washer switch?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3 |

1. Install the scan tool.
2. With a scan tool, enter headlamp washer controls by making the following selections:

• | Wiper/Washer System

• | Special Functions

• | Instrument Panel Module (IPM)

3. With a scan tool, command the Headlamp Washers ON.

Do the headlamp washers operate when they are commanded ON?

Go to Step 4

Go to Step 5

4 |

1. Install the scan tool.
2. Use scan tool to observe the Headlamp Washer Switch parameters in the wiper/washer system, IPM input data list.
3. Press the windshield washer switch.

Does the Headlamp Washer Switch parameter display On?

Go to Step 15

Go to Step 9

5 |

1. Remove the headlamp washer fluid pump relay.
2. Connect a test lamp from the battery positive voltage circuit, the switch side of the headlamp washer relay connector to a good ground.

Does the test light illuminate?

Go to Step 6

Go to Step 16

6 | Connect a test lamp from the battery positive voltage circuit, the switch side of the headlamp washer relay connector coil to a good ground. Does the test light illuminate? | Go to Step 7 | Go to Step 16
7 | Connect a 10-amp fused jumper wire between the battery positive voltage circuit, the switch side of the relay connector and the headlamp washer control circuit of the relay connector. Does the windshield washer fluid pump operate normally? | Go to Step 8 | Go to Step 11
8 |

1. Connect a test lamp between battery positive voltage and the headlamp washer relay control circuit of the relay connector.
2. With a scan tool, command the Headlamp Washer ON.

Does the test light illuminate?

Go to Step 13

Go to Step 10

9 | Test the windshield wiper switch signal 2 circuit between the IPM and the windshield wiper/washer switch for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs . Do you find and correct the condition? | Go to Step 20 | Go to Step 15
10 | Test the headlamp washer relay control circuit between the IPM and the headlamp washer fluid pump relay for the following conditions: Refer to Circuit Testing and Wiring Repairs .

• | An open circuit

• | High resistance

• | Short to battery voltage

Do you find and correct the condition?

Go to Step 20

Go to Step 15

11 | Test the headlamp washer fluid pump control circuit between the relay and the headlamp washer fluid pump for high resistance or an open. Refer to Circuit Testing and Wiring Repairs . Do you find and correct the condition? | Go to Step 20 | Go to Step 12
12 | Test the ground circuit of the windshield washer fluid pump for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs . Do you find and correct the condition? | Go to Step 20 | Go to Step 14
13 | Inspect for poor connections at the headlamp washer relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Do you find and correct the condition? | Go to Step 20 | Go to Step 17
14 | Check for poor connections at the harness connector of the headlamp washer fluid pump. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Do you find and correct the condition? | Go to Step 20 | Go to Step 18
15 | Check for poor connections at the harness connector of the IPM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Do you find and correct the condition? | Go to Step 20 | Go to Step 19
16 | Repair the short to ground or open in the appropriate battery positive voltage circuit of the headlamp washer relay. Refer to Circuit Testing and Wiring Repairs . Is the trouble corrected? | Go to Step 20 | --
17 | Replace the headlamp washer relay. Have you finished the replacement? | Go to Step 20 | --
18 | Replace the headlamp washer fluid pump. Refer to Headlamp Washer Pump Replacement . Have you finished the replacement? | Go to Step 20 | --
19 | Replace the instrument panel module. Refer to Control Module References for replacement, setup and programming. Have you finished the replacement? | Go to Step 20 | --
20 |

1. Reconnect all components disconnected previously.
2. Operate the system to verify the repair.

Is the failure removed?

System is OK.

Go to Step 2