Toyota
Dodge Durango
 Service Manual
Chime/Buzzer Warning Systems » Diagnosis and testing
Headlamp switch

For circuit descriptions and diagrams, refer to 8W-45 - Central Timer Module in Group 8W - Wiring Diagrams.

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO GROUP 8M - PASSIVE RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

(1) Disconnect and isolate the battery negative cable. Remove the headlamp switch from the instrument panel. Refer to Headlamp Switch in the Removal and Installation section of Group 8E - Instrument Panel Systems for the procedures.

Unplug the headlamp switch wire harness connectors.

Check for continuity between the driver door ajar switch sense circuit cavity of the headlamp switch wire harness connector and a good ground.

There should be continuity with the driver door open, and no continuity with the driver door closed. If OK, go to Step 2. If not OK, repair the circuit to the driver door ajar switch as required.

(2) Remove the Central Timer Module (CTM) from its mounting bracket to access the CTM wire harness connectors. Refer to Central Timer Module in the Removal and Installation section of Group 8E - Instrument Panel Systems for the procedures.

Unplug the 14-way CTM wire harness connector.

Remove the key from the ignition lock cylinder.

Check for continuity between the key-in ignition switch sense circuit cavity of the 14-way CTM wire harness connector and a good ground. There should be no continuity. If OK, go to Step 3. If not OK, repair the short circuit as required.

(3) Check for continuity between the key-in ignition switch sense circuit cavities of the 14-way CTM wire harness connector and the headlamp switch wire harness connector. There should be continuity. If OK, go to Step 4. If not OK, repair the open circuit as required.

(4) Check for continuity between the driver door ajar switch sense circuit terminal and the key-in ignition switch sense circuit terminal of the headlamp switch. There should be no continuity with the switch in the Off position, and continuity with the switch in the park or head lamps On position. If OK, see Central Timer Module in the Diagnosis and Testing section of this group. If not OK, replace the faulty headlamp switch.

    More about «Diagnosis and testing»:

    Central timer module

    Driver door ajar switch

    Key-in ignition switch

    Headlamp switch

    Driver seat belt switch

    Instrument cluster

    Dodge Durango Service Manual / Chime/Buzzer Warning Systems / Diagnosis and testing / Headlamp switch

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