Hi

I have a '83 911SC which has a brake warning light on the dashboard and it is on! Non of the manuals that I have seem to accurately describe the wiring on my car. It is a dual circuit system and the master cylinder has two connections each of three terminals. There is is also a switch to monitor the fluid level. There may also be pad wear sensors as well so we have all these inputs to one light.

How is a chap supposed to know what the problem is?

The brakes seem fine but I don't like driving with this light on. All the owners handbook says it to take the car to a dealer to be looked at.

Any clues would be gratefully received.

Thanks

 

easy answer is unlpug the connector from the clock hole.
other answer is new MC plugs and check the wear indicators if sc's have em. Im thinking they don't since the pads are cheaper. So I'd go for the MC plugs and ebrake switch under the handle.

 

Hi

Thanks for reply. Sorry but I am new to these cars - what do you mean by MC?

Is it easy to remove the clock?

Thanks

 

Sometimes, the brake light just needs to be 'reset'....another way to do this is to disconnect the battery(best to disconnect the negative first and when reconnecting you should connect the positive first).....and reconnect in a few minutes.....

 

Thanks, I will try it.

 

It worked!!! Now all I have to do is re-program the radio.


Many thanks

 

I think he means the master cylinder switch.

The switches are prone to failure.

The SCs do not have pad sensors as far as I know.

I think your year SC actualy has 2 master cylinder switches. look under the front and remove the carpet and black cardboard cover, you should see 2 switches going to the base of the master cylinder.

take the boot off your handbrake and you will see an adjustable switch under there, and the reservoir level is in the cap. I would first jumper these one at a time to find the culprit.

 

Yea....the radio should be easy...(:-)....and the clock is easy, too....that is if it works....

 

this sounds stupid but I guess I was.check your fluid level LOL that was my problem

 

Sometimes the MC trips the light if one axles pads are swapped and the others aren't, or something funky happened during a bleeding procedure.