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Home >> Chrysler >> 2004 >> Pacifica AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Body Diagnostic Procedures - Communication, Door Ajar, Electrically Heated Systems, Exterior Lighting >> Exterior Lighting >> Symptom: HEADLAMP SWITCH INPUT SHORT-BCM >> Diagnostic Procedure

Diagnostic Procedure

HEADLAMP SWITCH INPUT SHORT-BCM - DIAGNOSTIC PROCEDURE

TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIII®, clear all BCM DTC's.
Turn the headlamps to the ON position.
With the DRBIII®, read DTCs.
Does the DRBIII® display HEADLAMP SWITCH INPUT SHORT?
  1. Yes: Go To 2
  2. No: Go To 5
 All
2 Turn the ignition off.
Disconnect the Headlamp Switch harness connector.
Turn the ignition on.
With the DRBIII®, select Body, Body Control Module and read the Headlamp Switch voltage
Does the DRBIII® display a Headlamp Switch Voltage of more than 4.8 volts?
  1. Yes: Replace the Headlamp Switch in accordance with the Service Information.

    Perform BODY VERIFICATION TEST VER-1 .

  2. No: Go To 3
 All
3 Turn the ignition off to the lock position.
Disconnect the Body Control Module C5 harness connector.
Disconnect the Headlamp Switch harness connector.
NOTE: Check connectors - Clean/repair as necessary.

Measure the resistance between the Headlamp Switch MUX Return circuit and the Headlamp Switch MUX circuit.
Is the resistance less than 5.0 ohms?
  1. Yes: Repair the Headlamp Switch MUX circuit for a short to the Headlamp Switch MUX Return circuit.

    Perform BODY VERIFICATION TEST VER-1 .

  2. No: Go To 4
 All
4 Turn the ignition off to the lock position.
Disconnect the Body Control Module C5 harness connector.
Disconnect the Headlamp Switch harness connector.
NOTE: Check connectors - Clean/repair as necessary.

Measure the resistance between ground and the Headlamp Switch MUX circuit.
Is the resistance less than 5.0 ohms?
  1. Yes: Repair the Headlamp Switch MUX Circuit for a short to ground.

    Perform BODY VERIFICATION TEST VER-1 .

  2. No: Replace the Body Control Module in accordance with the Service Information.

    Perform BODY VERIFICATION TEST VER-1 .

 All
5 The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this circuit.
Wiggle the wiring while checking for shorts and open circuits.
Were there any problems found?
  1. Yes: Repair as necessary.

    Perform BODY VERIFICATION TEST VER-1 .

  2. No: Test Complete.
 All
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