Test Description

WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

3. Tests the circuit for a change in states.
5. Tests for proper operation of the circuit by bypassing the stop lamp switch. If the fuse in the jumper opens when you perform this test, the signal circuit of the stop lamp switch is shorted to ground.

Fig 1: DTC C1291 Testing Procedures (1 of 2)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC C1291 Testing Procedures (2 of 2)

Courtesy of GENERAL MOTORS CORP.