Diagnostic Test

WARNING: This page is about a different car, the 2005 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

1) INTERMITTENT CONDITION
Turn the ignition on.

With the Scan Tool, clear all FCM DTC's.

Turn the Front Wipers on.

With the Scan Tool, read the Front Wiper DTC's.

Does the Scan Tool read: B2305-WIPER PARK SWITCH INPUT CIRCUIT HIGH?

Yes
1. Go To step 2).
No
1. The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
2. Perform BODY VERIFICATION TEST - VER 1 .
2) (W7) FRONT WIPER PARK SWITCH SENSE CIRCUIT SHORT TO VOLTAGE

Fig 1: Checking (W7) Front Wiper Park Switch Sense Circuit For Short To Voltage
Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Front Wiper Motor harness connector.

Disconnect the IPM C1 harness connector.

Measure the voltage on the (W7) Front Wiper Park Switch Sense circuit.

Is the voltage above 5.0 volts?

Yes
1. Repair the (W7) Front Wiper Park Switch Sense circuit for a short to voltage.
2. Perform BODY VERIFICATION TEST - VER 1 .
No
1. Replace the FCM in accordance with the service information.
2. Perform BODY VERIFICATION TEST - VER 1 .