Diagnostic Test

Fig 1: Checking Switch Signal Circuit

Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the Rear Spoiler Limit Switch harness connector.

Turn the ignition on.

Measure the voltage of the Spoiler Limit Switch Signal (Up) circuit at the Spoiler Limit Switch harness connector.

Is the voltage above 10.0 volts? 

Yes 

1. Go to step  2).

No 

1. Go to step  4).

Fig 2: Checking Switch Signal Circuit

Courtesy of DAIMLERCHRYSLER CORP.

With the ignition on.

Measure the voltage of the Spoiler Limit Switch Signal (Down) circuit at the Rear Spoiler Limit Switch harness connector.

Is the voltage above 10.0 volts? 

Yes 

1. Replace the Rear Spoiler Limit Switch.
2. Perform REAR SPOILER VERIFICATION TEST .

No 

1. Go to step  3).

Fig 3: Checking Switch Signal Circuit

Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the BCM C4 harness connector.

Measure the resistance between ground and the Spoiler Limit Switch (Down) circuit.

Is the resistance below 100k ohms? 

Yes 

1. Repair the Spoiler Limit Switch Signal (Down) circuit for a short to ground.
2. Perform REAR SPOILER VERIFICATION TEST .

No 

1. Replace the Body Control Module. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/BODY CONTROL/CENTRAL TIMER MODULE - REMOVAL) .
2. Perform REAR SPOILER VERIFICATION TEST .

Fig 4: Checking Switch Signal Circuit

Courtesy of DAIMLERCHRYSLER CORP.

Turn the ignition off.

Disconnect the BCM C4 harness connector.

Measure the resistance between ground and the Spoiler Limit Switch (Up) circuit.

Is the resistance below 100k ohms? 

Yes 

1. Repair the Spoiler Limit Switch Signal (Up) circuit for a short to ground.
2. Perform REAR SPOILER VERIFICATION TEST .

No 

1. Replace the Body Control Module. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/BODY CONTROL/CENTRAL TIMER MODULE - REMOVAL) .
2. Perform REAR SPOILER VERIFICATION TEST .