Diagnostic Procedure

WARNING: This page is about a different car, the 2004 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.

FRONT WIPER INTERMITTENT INOP - DIAGNOSTIC PROCEDURE

TEST	ACTION
1	Turn the ignition off. Install a substitute relay in place of the Front Wiper Relay. Turn the ignition on. Select the Intermittent mode on the Front Wiper Switch. Do the Wipers Operate Properly? Yes --> Replace the Front Wiper Relay in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 2
2	Turn the ignition off. Disconnect the Front Wiper Motor harness connector. Using a 12-volt test light connected to ground, check the Fused Ignition Switch Output circuit to the Front Wiper Motor. NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery. Does the test light illuminate brightly? Yes --> Go To 3 No --> Repair the affected Fused Ignition Switch Output circuit to the Front Wiper Motor for an open. If the fuse is open make sure to check for a short to ground. Perform BODY VERIFICATION TEST - VER 1 .
3	Turn the ignition off. Remove the Front Wiper Relay. Using a 12-volt test light connected to ground, check both of the Fused Ignition Switch Output circuits to the Front Wiper Relay. NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery. Does the test light illuminate brightly? Yes --> Go To 4 No --> Repair the affected Fused Ignition Switch Output circuit to the Front Wiper Relay for an open. If the fuse is open make sure to check for a short to ground. Perform BODY VERIFICATION TEST - VER 1 .
4	Turn the ignition off. Disconnect the Front Wiper Switch harness connector. Select the Intermittent mode with the Front Wiper Switch. Measure the resistance of the Front Wiper Switch between the Fused Ignition Switch Output pin and the Front Wiper Intermittent Switch Signal Pin. Is the resistance between 2.5k and 20k ohms? Yes --> Go To 5 No --> Replace the Front Wiper Switch (Multi- Function Switch) in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1 .
5	Turn the ignition off. Disconnect the Front Wiper Switch harness connector. Select the Intermittent mode with the Front Wiper Switch. Measure the resistance of the Front Wiper Switch between the Fused Ignition Switch Output pin and the Front Wiper Intermittent Mode Sense Pin. Is the resistance above 5.0 ohms? Yes --> Replace the Front Wiper Switch (Multi- Function Switch) in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 6
6	Turn the ignition off. Disconnect the Front Wiper Switch harness connector. Select the Intermittent mode with the Front Wiper Switch. Measure the resistance of the Front Wiper Switch between the Front Wiper Relay Signal pin and the Front Wiper Motor Low Driver Pin. Is the resistance above 5.0 ohms? Yes --> Replace the Front Wiper Switch (Multi- Function Switch) in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 7
7	Turn the ignition off. Disconnect the Front Wiper Motor. Disconnect the Central Timer module. Measure the resistance of the Front Wiper Intermittent Mode Sense circuit. Is the resistance above 5.0 ohms? Yes --> Repair the Front Wiper Intermittent Mode Sense Circuit for an open. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 8
8	Turn the ignition off. Disconnect the Front Wiper Switch. Disconnect the Central Timer module. Measure the resistance of the Front Wiper Intermittent Switch Signal circuit. Is the resistance above 5.0 ohms? Yes --> Repair the Front Wiper Intermittent switch signal Circuit for an open. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 9
9	Turn the ignition off. Disconnect the Front Wiper Motor. Disconnect the Front Wiper Switch. Measure the resistance of the Front Wiper Motor Low Driver circuit from the Front Wiper Motor harness connector to both cavities of the Front Wiper Switch harness connector. Is the resistance above 5.0 ohms? Yes --> Repair the Front Wiper Motor Low Driver Circuit for an open. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 10
10	Turn the ignition off. Remove the Front Wiper Relay. Disconnect the Front Wiper Switch. Measure the resistance of the Front Wiper Relay Signal circuit. Is the resistance above 5.0 ohms? Yes --> Repair the Front Wiper Relay Signal Circuit for an open. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 11
11	Turn the ignition off. Disconnect the Front Wiper Switch. Disconnect the Central Timer Module. Measure the resistance between ground and the Front Wiper Intermittent Switch Signal circuit Is the resistance below 5.0 ohms? Yes --> Repair the Front Wiper Intermittent Switch Signal Circuit for a short to Ground. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 12
12	Turn the ignition off. Disconnect the Front Wiper Switch. Disconnect the Central Timer Module. Using a 12-volt test light connected to ground, check the Front Wiper Intermittent Switch Signal circuit. NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery. Does the test light illuminate brightly? Yes --> Repair the Front Wiper Intermittent Switch Signal Circuit for a short to Voltage. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 13
13	Turn the ignition off. Remove the Front Wiper Relay. Disconnect the Central Timer Module. Measure the resistance of the Front Wiper Relay Control circuit. Is the resistance above 5.0 ohms? Yes --> Repair the Front Wiper Relay Control Circuit for an open. Perform BODY VERIFICATION TEST - VER 1 . No --> Go To 14
14	If there are no possible causes remaining, view repair. Repair Replace the Central Timer Module in accordance with the Service Information. Perform BODY VERIFICATION TEST - VER 1 .