Code A033: Brake Switch Open
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 1991 Pontiac Grand Prix, 1991 Oldsmobile Cutlass Supreme, 1991 Buick Regal, 1990 Pontiac Grand Prix, and 1990 Oldsmobile Cutlass Supreme. However, it is still accessible from the selected car via links, so may be relevant.
Voltage is continuously applied to the brake switch. When brake switch is closed, voltage is applied to brakelights and terminal 1C11 (Light Blue wire) of anti-lock brake controller. The anti-lock brake controller can sense when brakes have been applied because voltage is received at the brake-apply input. To set Code A033, the following conditions must occur.
- Anti-lock brake controller senses no voltage at terminal 1C11 (Light Blue wire).
- Anti-lock brake controller senses two wheels are slowing at a rate that would be improbable without using the brakes.
NOTE:
Test numbers refer to test numbers on diagnostic chart.
- Checks for improperly adjusted or intermittent brake switch.
- Checks for improperly adjusted or intermittent brake switch.
NOTE:
INTERMITTENTS is located under DIAGNOSIS & TESTING.