Schematic Reference: Wiper/Washer Schematics

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

1. Turn the ignition ON, with the engine OFF.
2. Turn the wiper switch to the LO, HI, and INT positions.

Do the front wipers operate in the LO, HI, and INT positions?

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

Go to Step 3

Do the wipers operate in the LO and HI position, but not the INT position?

Go to Step 6

Go to Step 4

1. Disconnect the wiper motor.
2. Turn the ignition ON, with the engine OFF.
3. Turn the wiper switch to the affected speed.
4. With a test lamp connected to a good ground, test the corresponding voltage supply circuit at the wiper motor connector for ignition positive voltage.

Does the test lamp illuminate?

Go to Step 12

Go to Step 5

1. Turn the wiper switch to the affected speed.
2. With a test lamp connected to a good ground, test the corresponding voltage supply circuit at the wiper/washer switch for ignition positive voltage.

Does the test lamp illuminate?

Go to Step 16

Go to Step 11

1. Turn the wiper switch to the INT position.
2. With a test lamp connected to a good ground, test the front intermittent wiper switch signal circuit to the body control module (BCM) at the wiper/washer switch for ignition positive voltage.

Does the test lamp illuminate?

Go to Step 7

Go to Step 11

With a test lamp connected to a good ground, test the front intermittent wiper switch signal circuit to the BCM at the BCM wiring harness connector.

Does the test lamp illuminate?

Go to Step 8

Go to Step 14

1. Using a voltmeter, measure the voltage drop across the wiper dwell from the BCM wiper dwell input to a known good ground. Refer to Measuring Voltage Drop .
2. While rotating the wiper dwell from minimum to maximum and back observe the voltage drop across the wiper dwell.

Does the voltage range from 0-5 volts?

Go to Step 9

Go to Step 13

With a test lamp connected to a good ground, test the front intermittent wiper signal circuit from the BCM at the wiper switch assembly.

Does the test lamp turn ON and OFF and increase or decrease the time between ON and OFF as the wiper dwell is increased or decreased?

Go to Step 11

Go to Step 10

With a test lamp connected to a good ground, test the front intermittent wiper signal circuit from the BCM at the wiper dwell.

Does the test lamp turn ON and OFF and increase or decrease the time between ON and OFF as the wiper dwell is increased or decreased?

Go to Step 15

Replace BCM

Inspect for poor connections at the harness connector of the 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 20

Go to Step 17

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 20

Go to Step 18

Inspect for poor connections at the harness connector of the wiper dwell module assembly. 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 20

Go to Step 19

Repair the high resistance or open condition in the voltage signal circuit to the BCM. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 20

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Repair the high resistance or open condition in the voltage signal circuit from the BCM. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 20

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Repair the high resistance or open condition in the voltage supply circuit to the wiper motor. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 20

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Replace the front wiper/washer switch. Refer to Windshield Wiper and Washer Switch Replacement .

Did you complete the replacement?

Go to Step 20

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Replace the front wiper motor. Refer to Windshield Wiper Motor Replacement .

Did you complete the replacement?

Go to Step 20

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Repair the high resistance or open condition in the wiper dwell circuit to the BCM. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 20

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3