Dodge Ram 2004 Service Manual page 554

WINDSHIELD WIPER & WASHER
FCM-WIPER PARK SWITCH INPUT PERFORMANCE —
TEST
4 Turn the ignition off.
Disconnect the IPM C4 harness connector.
Disconnect the Wiper Motor harness connector.
Measure the voltage between the Wiper Park Switch Sense circuit and ground.
Is there any voltage present?
Yes → Repair the Wiper Park Switch Sense circuit for a short to voltage.
→ Go To 5
No
5 Turn the ignition off.
Disconnect the IPM C4 harness connector.
Disconnect the Wiper Motor harness connector.
Measure the resistance between ground and the Wiper Park Switch Sense circuit.
Is the resistance below 5.0 ohms?
Yes → Repair the Wiper Park Switch Sense circuit for a short to ground.
→ Go To 6
No
6 Turn the ignition off.
Disconnect the IPM C4 harness connector.
Disconnect the Wiper Motor harness connector.
Measure the resistance of the Wiper Park Switch Sense circuit.
Is the resistance above 5.0 ohms?
Yes → Repair the Wiper Park Switch Sense circuit for an open.
→ Go To 7
No
7 Turn the ignition off.
Remove the FCM from the IPM.
Disconnect the IPM C4 harness connector.
Measure the internal resistance of the Wiper Park Switch Sense circuit.
Is the resistance above 5.0 ohms?
Yes → Replace the Power Distribution Center (PDC) in accordance with
→ Replace the Front Control Module (FCM) in accordance with the
No
ACTION
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
540
Continued
APPLICABILITY
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