For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
1 | Did you perform the 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 both the front windshield and rear window wiper washer switches OFF.

Are the wipers OFF?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3 | Are the rear wipers always ON? | Go to Step 4 | Go to Step 7
4 |

1. The rear wipers are always ON.
2. Turn OFF the ignition.
3. Disconnect the rear wiper relay.
4. Turn ON the ignition, with the engine OFF.

Are the rear wipers OFF?

Go to Step 5

Go to Step 6

5 |

1. Turn OFF the ignition.
2. Connect a test lamp between the rear wiper relay control circuit and the accessory voltage side of the rear wiper relay at the rear wiper relay socket terminals.
3. Turn ON the ignition, with the engine OFF.

Does the test lamp illuminate?

Go to Step 8

Go to Step 16

6 | Test the rear window wiper motor control circuit for a short to voltage. Did you find and correct the condition? | Go to Step 20 | Go to Step 14
7 |

1. The front wipers are always ON.
2. Turn OFF the ignition.
3. Disconnect the harness connector of the windshield wiper washer switch.
4. Turn ON the ignition, with the engine OFF.

Are the front wipers OFF?

Go to Step 9

Go to Step 15

8 |

1. Turn OFF the ignition.
2. Disconnect the harness connector J5 of the BCM.
3. Connect a test lamp between the rear wiper switch signal circuit of the harness connector and a good ground.
4. Turn ON the ignition, with the engine OFF.

Does the test lamp illuminate?

Go to Step 10

Go to Step 12

9 | Connect a test lamp between the windshield wiper switch pulse delay signal circuit of the harness connector and a good ground. Does the test lamp illuminate? | Go to Step 11 | Go to Step 13
10 | Test the rear wiper switch signal circuit for a short to voltage. Did you find and correct the condition? | Go to Step 20 | Go to Step 13
11 | Test the windshield wiper switch pulse delay signal circuit for a short to voltage. Did you find and correct the condition? | Go to Step 20 | Go to Step 12
12 | Inspect for poor connections at the BCM. Did you find and correct the condition? | Go to Step 20 | Go to Step 19
13 | Inspect for poor connections at the windshield wiper washer switch. Did you find and correct the condition? | Go to Step 20 | Go to Step 18
14 | Inspect for poor connections at the rear wiper motor. Did you find and correct the condition? | Go to Step 20 | Go to Step 17
15 | Repair the windshield wiper motor high speed circuit or the windshield wiper motor low speed circuit for a short to voltage. Did you complete the repair? | Go to Step 20 | --
16 | Replace the rear wiper relay. Did you complete the replacement? | Go to Step 20 | --
17 | Replace the rear wiper motor. Did you complete the replacement? | Go to Step 20 | --
18 | Replace the windshield wiper washer switch. Did you complete the replacement? | Go to Step 20 | --
19 | Replace the BCM. Refer to Body Control Module Programming and Setup for replacement, setup, and programming. Did you complete the replacement? | Go to Step 20 | --
20 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2