Brake Lamp Switch
NOTE:
Before proceeding with this diagnostic test, verify the adjustment of the brake lamp switch to rule out misadjustment. See BRAKE LAMP SWITCH
under ADJUSTMENTS. If the electrical circuit has been tested and the brake lamp switch is suspected of being faulty, it can be tested using the following methods.
- Remove the switch from the vehicle. See BRAKE LAMP SWITCH under REMOVAL & INSTALLATION.
- With the switch in the released position (plunger extended), use an ohmmeter to test each of the 3 internal switches. See Fig 1 . The results should be as indicated in the illustration.
- Gently push the plunger on the brake lamp switch in until it stops.
- With the switch in the depressed position (plunger pushed in), use an ohmmeter to test each of the 3 internal switches. See Fig 2 . The results should be as indicated in the illustration.
- If results are not as shown in both illustrations, the switch is faulty and must be replaced.