For 1990-2009 cars

## Wipers Inoperative - One or More Modes Front Wiper

Step | Action | Values | Yes | No
--- | --- | --- | --- | ---
Schematic Reference: Wiper/Washer Schematics Connector End View Reference: Wiper/Washer Connector End Views
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 |

1. Turn the ignition ON, with the engine OFF.
2. Operate the windshield wiper/washer switch through all the switch positions.

Does the windshield wiper/washer system operate normally?

--

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3 | Are the wipers only inoperative when the washer switch is depressed? | -- | Go to Step 16 | Go to Step 4
4 | Are the windshield wipers only inoperative in the high speed mode? | -- | Go to Step 11 | Go to Step 5
5 |

1. Turn OFF the ignition.
2. Connect a test lamp from the signal circuit of the windshield wiper switch to a good ground.
3. Turn ON the ignition, with the engine OFF.
4. Operate the windshield wiper switch.

Does the test lamp illuminate?

--

Go to Step 7

Go to Step 6

6 |

1. Turn OFF the ignition.
2. Disconnect the harness connector of the wiper/washer switch.
3. Turn ON the ignition, with the engine OFF.
4. Operate the windshield wiper/washer switch through all the switch positions.
5. Measure the resistance of the windshield wiper switch from the accessory voltage circuit to the signal circuit of the windshield wiper switch.

Is the resistance within the specified range?

1700-9500 ohms

Go to Step 17

Go to Step 24

7 | Command the wiper 1 relay ON and OFF by cycling the windshield wiper/washer switch from the High to the Low positions. Do you hear a click when you command the wiper 1 relay ON and OFF? | -- | Go to Step 10 | Go to Step 8
8 |

1. Disconnect the wiper 1 relay.
2. Connect a test lamp from the supply voltage circuit to the ground circuit of the wiper 1 relay coil.
3. Place the wiper/washer switch in the Low speed position.

Does the test lamp illuminate?

--

Go to Step 23

Go to Step 9

9 | Connect a test lamp from the supply voltage circuit of the wiper 1 relay coil to a good ground. Does the test lamp illuminate? | -- | Go to Step 27 | Go to Step 18
10 |

1. Disconnect the wiper 1 relay.
2. Connect a test lamp from the battery voltage circuit of the wiper 1 relay switched input to a good ground.

Does the test lamp illuminate?

--

Go to Step 23

Go to Step 18

11 | Command the wiper 2 relay ON and OFF by cycling the windshield wiper/washer switch from the High to the Low positions. Do you hear a click when you command the wiper 2 relay ON and OFF? | -- | Go to Step 14 | Go to Step 12
12 |

1. Disconnect the wiper 2 relay.
2. Connect a test lamp from the voltage supply circuit to the ground circuit of the wiper 2 relay coil.
3. Place the wiper/washer switch in the High speed position.

Does the test lamp illuminate?

--

Go to Step 23

Go to Step 13

13 | Connect a test lamp from the supply voltage circuit of the wiper 2 relay coil to a good ground. Does the test lamp illuminate? | -- | Go to Step 27 | Go to Step 20
14 |

1. Disconnect the wiper 2 relay.
2. Connect a test lamp from the battery voltage circuit supplied from the wiper 1 relay to the wiper 2 relay switched input to a good ground.
3. Place the wiper/washer switch in the Low speed position.

Does the test lamp illuminate?

--

Go to Step 15

Go to Step 28

15 |

1. Reconnect the wiper 2 relay.
2. Connect a test lamp at the wiper 2 relay switched output to a good ground.
3. Place the wiper/washer switch in the Low speed position.

Does the test lamp illuminate?

--

Go to Step 21

Go to Step 23

16 |

1. Turn OFF the ignition.
2. Disconnect the harness connector of the wiper/washer switch.
3. Turn ON the ignition, with the engine OFF.
4. Connect a test lamp from the accessory voltage circuit to the signal circuit of the windshield washer pump control.

Does the test lamp illuminate?

--

Go to Step 24

Go to Step 22

17 | Test the signal circuit of the wiper/washer switch for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 26
18 | Test the supply voltage circuit of the wiper 1 relay coil for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 26
19 | Test the low speed circuit of the windshield wiper motor for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 25
20 | Test the supply voltage circuit of the wiper 2 relay coil for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 24
21 | Test the high speed circuit of the windshield wiper motor for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 25
22 | Test the control circuit of the windshield washer pump for an open or high resistance. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 26
23 | Inspect for poor connections at the inoperative wiper relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 29
24 | 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 . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 30
25 | Inspect for poor connections at the harness connector of 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 33 | Go to Step 31
26 | 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 . Did you find and correct the condition? | -- | Go to Step 33 | Go to Step 32
27 | Repair an open or high resistance in the ground circuit of the inoperative wiper relay coil. Refer to Wiring Repairs or Connector Repairs . Did you complete the repair? | -- | Go to Step 33 | --
28 | Repair an open or high resistance in the battery voltage circuit of the wiper 2 relay switched input. Refer to Wiring Repairs or Connector Repairs . Did you complete the repair? | -- | Go to Step 33 | --
29 | Replace the inoperative wiper relay. Did you complete the replacement? | -- | Go to Step 33 | --
30 | Replace the windshield wiper/washer switch. Refer to Windshield Wiper and Washer Switch Replacement . Did you complete the replacement? | -- | Go to Step 33 | --
31 | Replace the windshield wiper motor. Refer to Windshield Wiper Motor Replacement . Did you complete the replacement? | -- | Go to Step 33 | --
32 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 33 | --
33 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3