Test Description

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 (Steps 1 - 4)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC C1291 (Steps 5 - 14)

Courtesy of GENERAL MOTORS CORP.