For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Wiper/Washer Schematics Connector End View Reference: Master Electrical Component List in Wiring Systems
1 | Did you perform the Wiper/Washer Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Wiper/Washer
2 |

1. Turn the ignition ON, with the engine OFF.
2. Operate the front and rear wiper switch through all switch positions.

Do the wiper system operate normally?

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

Go to Step 3

3 | Are the wipers inoperative in the front and rear? | Go to Step 21 | Go to Step 4
4 | Are the wipers only inoperative in the front? | Go to Step 5 | Go to Step 9
5 | Is there only one mode inoperative in the front wipers? | Go to Step 6 | Go to Step 8
6 | Is the mode intermittent? | Go to Step 15 | Go to Step 7
7 | Is the mode LOW or MIST? | Go to Step 16 | Go to Step 18
8 |

1. Connect a test lamp between the HIGH front wiper motor control circuit and the front wiper motor ground circuit.
2. Turn the front wipers to HIGH.

Does the test lamp illuminate?

Go to Step 23

Go to Step 20

9 |

1. The wipers are inoperative in the rear.
2. Connect a test lamp between the rear wiper relay voltage control circuit and a good ground.
3. Turn the rear wipers to intermittent.

Does the test lamp illuminate?

Go to Step 10

Go to Step 11

10 | Connect a test lamp between the rear wiper motor voltage control circuit and the rear wiper motor ground. Does the test lamp illuminate? | Go to Step 23 | Go to Step 12
11 | Connect a test lamp between the rear wiper relay voltage circuit and the rear wiper relay control circuit. Does the test lamp illuminate? | Go to Step 29 | Go to Step 13
12 | Connect a test lamp between the rear wiper motor voltage control circuit and a good ground. Does the test lamp illuminate? | Go to Step 25 | Go to Step 26
13 | Connect a test lamp between the rear wiper input control circuit and a good ground. Does the test lamp illuminate? | Go to Step 24 | Go to Step 14
14 |

1. Turn OFF the ignition.
2. Disconnect the windshield wiper/washer switch.
3. Test the wiper input control circuit for an open or short to ground.

Did you find and correct the condition?

Go to Step 31

Go to Step 22

15 |

1. Connect a test lamp between the front wiper input control circuit and a good ground.
2. Turn the front wipers to intermittent.

Does the test lamp illuminate?

Go to Step 24

Go to Step 22

16 |

1. Connect a test lamp at the LOW/MIST control circuit at the front wiper motor and a good ground.
2. Turn the front wiper switch to LOW or MIST.

Does the test lamp illuminate?

Go to Step 23

Go to Step 17

17 |

1. Turn OFF the ignition.
2. Disconnect the windshield wiper/washer switch connector.
3. Test the LOW/MIST control circuit for an open or a short to ground.

Did you find and correct the condition?

Go to Step 31

Go to Step 22

18 |

1. The inoperative mode is HIGH.
2. Connect a test lamp at the HIGH control circuit at the front wiper motor and a good ground.
3. Turn the front wiper switch to HIGH.

Does the test lamp illuminate?

Go to Step 23

Go to Step 19

19 |

1. Turn OFF the ignition.
2. Disconnect the windshield wiper/washer switch connector.
3. Test the high control circuit for an open or a short to ground.

Did you find and correct the condition?

Go to Step 31

Go to Step 22

20 | Connect a test lamp between the HIGH front wiper motor control circuit and a good ground. Does the test lamp illuminate? | Go to Step 25 | Go to Step 22
21 | Test the ground circuit for the wiper motors for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 31 | Go to Step 22
22 | Inspect for poor connections at the harness connector of the windshield wiper/washer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 31 | Go to Step 27
23 | Inspect for poor connections at the harness connector of the wiper motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 31 | Go to Step 28
24 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 31 | Go to Step 30
25 | Repair an open in the wiper motor ground circuit. Refer to Wiring Repairs and Connector Repairs in Wiring Systems. Did you complete the repair? | Go to Step 31 | --
26 | Repair an open or short to ground in the rear wiper motor voltage control circuit. Refer to Wiring Repairs and Connector Repairs in Wiring Systems. Did you complete the repair? | Go to Step 31 | --
27 | Replace the windshield wiper/washer switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column. Did you complete the replacement? | Go to Step 31 | --
28 | Replace the wiper motor. Refer to Windshield Wiper Motor Replacement . Did you complete the replacement? | Go to Step 31 | --
29 | Replace the rear wiper relay. Refer to Relay Replacement in Wiring Systems. Did you complete the replacement? | Go to Step 31 | --
30 | Important: Perform the programming or set up procedure for the replaced control module if required. Replace the BCM. Refer to Body Control Module Replacement in Body Control System for applicable replacement procedure. Did you complete the replacement? | Go to Step 31 | --
31 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2