Grand Caravan V6-3.3L Flex Fuel (2008)
Brake Light Switch: Testing and Inspection
DIAGNOSIS AND TESTING - BRAKE LAMP SWITCH
Switch Test - Released Position
NOTE: Before proceeding with this diagnostic test, verify the adjustment lever on the back of the switch is in the adjusted position. If the lever
is in the non-adjusted (diagonal) position it may have never been adjusted See: Description and Operation/Operation. For adjustment, See:
Service and Repair/Installation
If the electrical circuit has been tested and the brake lamp switch is suspected of being faulty, utilize the scantool and monitor the inputs from the switch
to the PCM. The switch can also be tested using the following method.
1. Remove the switch from the vehicle.See: Service and Repair/Removal
2. With the switch in the released position (plunger extended), use an ohmmeter to test each of the three internal switches as shown, you should
achieve the results as listed in.
3. Gently push the plunger on the brake lamp switch in until it stops.
Switch Test - Depressed Position
4. With the switch in this depressed position (plunger pushed in), use an ohmmeter to test each of the three internal switches as shown in. You should
achieve the results as shown.
If you do not achieve the results as listed in both figures, the switch is faulty and must be replaced.
If the switch is found to be operating properly, it may be mis-adjusted. Do not reinstall the switch, replace it.See: Service and Repair/Installation
CAUTION: The switch can only be adjusted once. That is during initial installation of the switch. If the switch is not adjusted properly or has
been removed for any reason, a new switch must be installed and adjusted.