For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Wiper/Washer Schematics Connector End View Reference: Wiper/Washer Connector End Views DEFINITION: The windshield wiper motor will not operate in any mode.
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.
2. Attempt to operate the wipers in each mode.

Do the windshield wipers operate in any mode?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3 | Are the DTCs B3717 or B3718 stored in the body control module (BCM)? | Go to DTC B3715, B3716, B3717, B3718, or B3719 | Go to Step 4
4 |

1. Turn the wiper switch to the high speed position.
2. Disconnect the windshield wiper motor.
3. Probe the windshield wiper motor high and low speed circuits with a test lamp connected to a good ground.

Does the test lamp illuminate for either circuit?

Go to Step 14

Go to Step 5

5 |

1. Remove the wiper 2 relay from the underhood fuse block. Refer to Relay Replacement .
2. Probe the windshield wiper switch signal 2 circuit from the wiper switch with a test lamp connected to a good ground.

Does the test lamp illuminate?

Go to Step 6

Go to Step 10

6 | Probe the common switched terminal of the wiper 2 relay with a test lamp connected to a good ground. Does the test lamp illuminate? | Go to Step 13 | Go to Step 7
7 |

1. Remove the wiper micro relay from the underhood fuse block. Refer to Relay Replacement .
2. Probe the windshield wiper switch signal 2 circuit from the BCM with a test lamp connected to a good ground.

Does the test lamp illuminate?

Go to Step 8

Go to Step 12

8 | Connect a test lamp between the windshield wiper switch signal 2 circuit from the BCM and the coil ground circuit. Does the test lamp illuminate? | Go to Step 9 | Go to Step 24
9 | Probe the wiper micro relay voltage supply circuit with a test lamp connected to a good ground. Does the test lamp illuminate? | Go to Step 16 | Go to Step 22
10 |

1. Disconnect the underhood fuse block J7 connector.
2. Probe the windshield wiper switch signal 2 circuit from the BCM with a test lamp connected to a good ground.

Does the test lamp illuminate?

Go to Step 21

Go to Step 11

11 |

1. Disconnect the wiper/washer switch.
2. Probe the wiper switch voltage supply circuit with a test lamp connected to a good ground.

Does the test lamp illuminate?

Go to Step 15

Go to Step 23

12 |

1. Remove the wiper diode from the underhood fuse block.
2. Connect a 3-amp fused jumper between the diode terminals of the underhood fuse block. Refer to Using Fused Jumper Wires .
3. Probe the windshield wiper switch signal 2 circuit from the BCM with a test lamp connected to a good ground.

Does the test lamp illuminate?

Go to Step 18

Go to Step 30

13 | Test the windshield wiper motor high and low speed circuits for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 31 | Go to Step 17
14 | Test the windshield wiper motor ground circuit for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 31 | Go to Step 19
15 | Test the windshield wiper switch signal 2 circuit from the switch for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 31 | Go to Step 20
16 | Inspect for poor connections at the wiper 2 relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 31 | Go to Step 25
17 | Inspect for poor connections at the wiper 2 relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 31 | Go to Step 26
18 | Inspect for poor connections at the wiper diode. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 31 | Go to Step 27
19 | Inspect for poor connections at the windshield wiper motor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 31 | Go to Step 28
20 | Inspect for poor connections at the windshield wiper/washer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 31 | Go to Step 29
21 | Inspect for poor connections at the windshield wiper/washer switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 31 | Go to Step 30
22 | Repair the open or high resistance in the wiper micro relay voltage supply circuit. Refer to Wiring Repairs and Connector Repairs . Did you complete the repair? | Go to Step 31 | --
23 | Repair the open or high resistance in the wiper/washer switch voltage supply circuit. Refer to Wiring Repairs and Connector Repairs . Did you complete the repair? | Go to Step 31 | --
24 | Repair the open or high resistance in the wiper micro relay ground circuit. Refer to Wiring Repairs and Connector Repairs . Did you complete the repair? | Go to Step 31 | --
25 | Replace the wiper micro relay. Refer to Relay Replacement . Did you complete the replacement? | Go to Step 31 | --
26 | Replace the wiper 2 relay. Refer to Relay Replacement . Did you complete the replacement? | Go to Step 31 | --
27 | Replace the wiper diode. Did you complete the replacement? | Go to Step 31 | --
28 | Replace the windshield wiper motor. Refer to Windshield Wiper Motor Replacement . Did you complete the replacement? | Go to Step 31 | --
29 | Replace the windshield wiper/washer switch. Refer to Turn Signal Multifunction Switch Replacement . Did you complete the replacement? | Go to Step 31 | --
30 | Replace the underhood fuse block. Refer to Underhood Electrical Center or Junction Block Replacement . 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