Ignition Switch In Run Position
- Jump park brake switch terminal (Gray/Black wire) to ground. If indicator light comes on, replace park brake switch. If indicator light stays off, repair open circuit between park brake switch connector and instrument cluster.
- Jump brake warning switch terminal at proportioning valve (Gray wire) to ground. If indicator light comes on, replace brake warning switch. If indicator light stays off, repair open circuit between brake warning switch connector and instrument cluster.