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Home >> Chrysler >> 2003 >> PT Cruiser Limited, Standard >> Repair and Diagnosis (Single Page) >> Brakes >> Anti-Lock Brakes >> Chassis Diagnostic Procedures - Anti-Lock Brake System >> Diagnostic Information And Procedures >> Brakes (Cab) - Symptoms >> Symptom: CAB POWER FEED >> Diagnostic Procedure

Diagnostic Procedure

CAB POWER FEED

TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIII®, erase DTC's.
Turn the ignition off.
Turn the ignition on.
Drive the vehicle above 25 km/h (15 mph) for at least 10 seconds.
Stop the vehicle.
With the DRBIII®, read DTC's.
Does the DRBIII® display CAB Power Feed?
  1. Yes --> Go To 2
  2. No --> Go To 10
 All
2 Turn the ignition off.
Remove and Inspect the ABS Fuse 7 in the PDC.
Is the Fuse blown?
  1. Yes --> Go To 3
  2. No --> Go To 7
 All
3 Turn the ignition off.
Visually inspect the Fused B(+) Circuit in the wiring harness from the PDC to the CAB. Look for any sign of an intermittent short to ground.
Is the wiring harness OK?
  1. Yes --> Go To 4
  2. No --> Repair the Fused B(+) Circuit Shorted to Ground.

    Perform ABS VERIFICATION TEST - VER 1 .

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4 Turn the ignition off.
Remove the ABS Fuse 7 from the PDC.
Disconnect the CAB harness connector.
NOTE: Check connector - Clean/repair as necessary.

Using a test light connected to 12 volts, probe the Fused B(+) Circuit.
Is the test light on?
  1. Yes --> Repair the Fused B(+) Circuit Shorted to Ground.

    Perform ABS VERIFICATION TEST - VER 1 .

  2. No --> Go To 5
 All
5 Turn the ignition off.
Remove the ABS Fuse 7 from the PDC.
The CAB must be connected for the results of this test to be valid.
Using a test light connected to 12 volts, probe the Fused B(+) Circuit at the PDC fuse terminal.
Is the test light on?
  1. Yes --> Replace the CAB.

    Perform ABS VERIFICATION TEST - VER 1 .

  2. No --> Go To 6
 All
6 Turn the ignition off.
If there are no potential causes remaining, view repair, replace the fuse. Perform ABS VERIFICATION TEST - VER 1 .		 All
7 Remove the ABS Fuse 7 from the PDC.
Turn the ignition on.
Measure the voltage of the Fused B+ supply to Fuse 7 in the PDC.
Is the voltage above 10 volts?
  1. Yes --> Go To 8
  2. No --> Repair the B+ Supply circuit for an open.

    Perform ABS VERIFICATION TEST - VER 1 .

 All
8 Turn the ignition off.
Remove the ABS Fuse 7 from the PDC.
Disconnect the CAB harness connector.
NOTE: Check connector - Clean/repair as necessary.

Measure the resistance of the Fused B(+) circuit between the PDC Fuse terminal 7 and the CAB connector.
Is the resistance below 5 ohms?
  1. Yes --> Go To 9
  2. No --> Repair Fused B(+) Circuit Open.

    Perform ABS VERIFICATION TEST - VER 1 .

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9 If there are no potential causes remaining, replace the CAB. Perform ABS VERIFICATION TEST - VER 1 . All
10 Turn the ignition off.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
Visually inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals.
Refer to any Hotline letters or Technical Service Bulletins that may apply.
Were any problems found?
  1. Yes --> Repair as necessary.

    Perform ABS VERIFICATION TEST - VER 1 .

  2. No --> Test Complete.
 All
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