Brake Light sensor

[Flakman]

:confused: I have an 87 300E. The "light bulb out" warning light comes on as soon as I press the brake pedal. I've checked all lights all the way around and everything looks good. Is there a sensor that is going out, or a possible wiring problem? Any ideas would help considerably.

Thanks.

[Robert Goodwin]

OK John, how do you walk around the car and check the brake lights?

There is an external lamp sensor that illuminates the bulb on your instrument panel when a filament has burned out. Circuit symbol is N&. It is located in the rear of your fuse box in position K.

The sensors do occaisionally go bad, but it is most likely a light bulb.

[Flakman]

LOL! It was a team effort to check the brake lights. I had my girlfriend step on the brakes as I checked the lights in the back. Any idea on the part number for the sensor? I haven't seen the sensor on any of the sites online, and haven't plopped down the $150 for the repair CDs yet.

[Erich Borden]

Have you checked your third brake light in the rear window? My warning light was also on when I noticed this bulb was out.

Erich

[Flakman]

Thanks, Erich. Bonehead rookie move on my part. Finally took a look at the third brake light. That was it.

Cheaper than a sensor...that's for sure!

Thanks for help, guys.