Had a stange problem the other day.
Brake lamp failed on the Chevy Blazer. Dug out a spare one from my store and fitted it. Works fine. However, strange things started to happen. With the engine off pressing the brake pedal resulted in the warning beeper going off.
With the engine running the beeper didn't sound but the dash board lights went out whenever I pressed the brake pedal. At night the dash lights stayed on. Changed the lamp and problem disappeared.
I guess there must have been some sort of voltage leak/short within the lamp that confused the car's brain but was not enough to blow the lamp.
Brake lamp failed on the Chevy Blazer. Dug out a spare one from my store and fitted it. Works fine. However, strange things started to happen. With the engine off pressing the brake pedal resulted in the warning beeper going off.
With the engine running the beeper didn't sound but the dash board lights went out whenever I pressed the brake pedal. At night the dash lights stayed on. Changed the lamp and problem disappeared.
I guess there must have been some sort of voltage leak/short within the lamp that confused the car's brain but was not enough to blow the lamp.