fogcity123

Hi. The BRAKE warning light comes on shortly after starting along with the light that has an outline of the four wheels and axel. Any ideas what this can be?

Also, I've changed pads on an '84 Carrera. How different is it on my '90 964?

Many thanks.

RayB_911

Is it a C4 or C2? does it go away after running a bit?

vagluv

I had that one time recently. Does it do it all the time?

When you turn the key to on are you waiting until the pump stops running to start the car?

fogcity123

It's a C4. It doesn't go away after running. If lucky, it doesn't come on for maybe a block but usually before I get out of the driveway. Been this way for probably 6 months. No noticeable difference in driving or braking.

I don't wait for the pump to stop running before I start the car - haven't in the 2+ years of owning it. Should I be?

Thanks.

vagluv

the only time ive had it is the only time i can remember that i didnt wait for that pump.

try that and see if it changes anything.

fogcity123

I'll try. Thanks.

Rocket Rob

C4s are very sensitive to brake fluid levels in the reservoir. I recommend that you ensure that yours is at the max line.

tm.cz

Exactly what mine was doing. Topped up the brake fluid and no issue since

fogcity123

Great! I'll try that.
Now, what brake fluid? Dot 5?

Laker

DOT 4. Check it's at the FULL mark with the engine running.

fogcity123

There we go. It's at the min level with engine running. Do I top it off with the engine running (ie I can open the cap with engine running). Thanks.

Rocket Rob

Yes, you can open the cap with the engine running.

RayB_911

I've had the same situation in my C4 I plan to take a look when I get it out of storage. The lights and sound usually turned off before I got out of driveway and would not come on again until next time it sat in garage.

fogcity123

Speaking of brakes, I've changed the pads on an '84 Carrera I use to have; is this '90 C4 as traight forward? Thanks.

fogcity123

Topping it off with brake fluid did the trick! Amazing: I've been driving around for 4-5 months just ignoring the warning lights figuring it was just an "old car" thing. Nice to have them off again.
Now, do I attempt to replace my brake pads myself? Again, much harder then an '84 Porsche (or for that matter a 2001 BMW or '65 falcon - I've done all those brakes)?