Below is the headlight switch service procedure for the 2006 model year. If the headlight switch resistances test OK, then it is off to the dealer. The TIPM requires a scan tool for diagnostics and there are a few complex procedures involved with testing the TIPM.
DIAGNOSIS AND TESTING HEADLAMP SWITCH
WARNING: To avoid personal injury or death, on vehicles equipped with airbags, disable the supplemental restraint system before attempting any steering wheel, steering column, airbag, seat belt tensioner, impact
sensor, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the supplemental restraint system. Failure to take the proper precautions could result in accidental airbag deployment.
1. Remove the cluster bezel and the headlamp switch from the instrument panel as a unit. (Refer to 23 -BODY/INSTRUMENT PANEL/CLUSTER BEZEL -
REMOVAL).
2. Disconnect the wire harness connector from the back of the headlamp switch.
3. Using an ohmmeter, test the resistance or continuity between the terminals of the switch as shown in the Headlamp Switch Tests table.
HEADLAMP SWITCH TESTS
SWITCH POSITION (PINS) RESISTANCE RANGE (OHMS)
OFF (1 and 3) 1938.0 - 2147.0
PARK (1 and 3) 1073.0 - 1191.5
HEADLAMP (1 and 3) 627.0 - 698.0
FOG LAMP - AUTO (1 and 3) 347.2 - 388.8
FOG LAMP - OFF (1 and 3) 317.7 - 356.1
FOG LAMP - PARK (1 and 3) 280.7 - 315.2
FOG LAMP - HEADLAMP (1 and 3) 236.6 - 266.5
DOME DEFEAT (2 and 3) 14143.6 - 15610.4
PANEL DIMMER 1 (2 and 3) 5498.6 - 6055.4
PANEL DIMMER 2 (2 and 3) 2933.6 - 3220.4
PANEL DIMMER 3 (2 and 3) 1793.6 - 1960.4
PANEL DIMMER 4 (2 and 3) 1147.6 - 1246.4
PANEL DIMMER 5 (2 and 3) 739.1 - 794.9
PANEL DIMMER 6 (2 and 3) 482.6 - 511.4
PARADE/FUNERAL MODE (2 and 3) 301.9 - 327.1
DOME ON (2 and 3) 166.3 - 188.8
CARGO (3 and 6) MOMENTARY CONTINUITY
SWITCH ILLUMINATION (4 and 5) CONTINUITY AT ALL TIMES
4. If the switch fails any of the tests, replace the inoperative headlamp switch as required.
REMOVAL
WARNING: To avoid personal injury or death, on vehicles equipped with airbags, disable the supplemental restraint system before attempting any steering wheel, steering column, airbag, seat belt tensioner, impact
sensor, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the supplemental restraint system. Failure to take the proper precautions could result in accidental airbag deployment.
1. Disconnect and isolate the battery negative cable.
2. Remove the cluster bezel (1) from the instrument panel. (Refer to 23 - BODY/INSTRUMENT PANEL/CLUSTER BEZEL - REMOVAL).
3. Disconnect the wire harness connector (3) from the back of the headlamp switch (4).
4. Place the cluster bezel face down on a suitable work surface. Be certain to take the proper precautions to protect the face of the bezel from cosmetic
damage.
5. Remove the three screws (2) that secure the headlamp switch to the back of the cluster bezel.
6. Remove the headlamp switch from the cluster bezel.
INSTALLATION
WARNING: To avoid personal injury or death, on vehicles equipped with airbags, disable the supplemental restraint system before attempting any steering wheel, steering column, airbag, seat belt tensioner, impact
sensor, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the supplemental restraint system. Failure to take the proper precautions could result in accidental airbag deployment.
1. Position the headlamp switch (4) to the back of the cluster bezel (1).
2. Install and tighten the three screws (2) that secure the headlamp switch to the cluster bezel. Tighten the screws to 2 N·m (20 in. lbs.).
3. Position the cluster bezel close enough to the instrument panel to reconnect the wire harness connector (3) to the back of the headlamp switch.
4. Reinstall the cluster bezel onto the instrument panel. (Refer to 23 - BODY/INSTRUMENT PANEL/ CLUSTER BEZEL - INSTALLATION).
5. Reconnect the battery negative cable.
