streetsnake

I just finished redoing the brakes and rotors and put in new wear pad sensors in my '79. The light on the cluster is still on. Ugh. Any ideas on what to check?

76FJ55

Is it the light that connects to the switch below the parking brake handle to tell you the parking brake is set?

GerritD

I believe you mean BREMSKREIS = BRAKE SYSTEM
This is triggered by the 2 switches in your brake master cilinder.
Did you also renew your brake master cilinder ? if so, please also replace both switches

streetsnake

sorry. A pic is worth a thousand words. It’s “brake pad” on the cluster. I haven’t made it to the central warning system yet. Nothing shows up there for anything. Ugh. The PO saw me coming and just smiled to himself. A newbie that doesn’t know Porsche. Lol

Zirconocene

Seems like it's a short on the way to the cluster; have you inspected the plugs and wiring in the wheel well?

Also, if you're interested, there are good posts over on the 944 board for how to deal with the stippling of the gauge surround. I have it to do in the future on my 944; my 928s are not (yet) to the point yours is.

Cheers and good luck

Mrmerlin

If thats your only problem thats nothing to worry about.

To trouble shoot the warning system ,
think of the brake sensor system as a long loop of wire that stops at each wheel location,
if the rotor wears through the wire then the light will illuminate. so to test it make small jumper units unplug each wheel sensor and add the jumper,
retest after adding each jumper,
if after adding all 4 jumpers the lamp is still lit.
Please report your results

streetsnake

thanks. That makes sense for once. I’ll get that done and report back. Thanks

streetsnake

I didn’t think the stippling looked bad. Lol. One thing that is annoying, is I have the tiniest of cracks. I thought they were scratches but no such luck. Any tricks for that?

GerritD

Then you have the same issue as I mentioned in the following thread:
https://rennlist.com/forums/showthre...ferrerid=85647

For me unfortunately bridging pin 19 and 20 on the CWU did not bring a solution, so I removed the bulb for the brake pad warning.
But you can first try to bridge 19 and 20 ( black plug) on your Central Warning Unit , behind your footrest.

Btw : on my 928S euro it is called BREMSBELAG

streetsnake

Thanks for sharing your previous post. Question: Does the "Brake Pad" or "Bremsbelag" stay lit until you press the brake pedal?

Mrmerlin

NOTE please read the owners manual for your car,
it goes into great detail on how the systems work

Zirconocene

@streetsnake : for cracks in plastic like that I've used Q Bond with good success. I've generally tried to build things up from the non-show face. It's a cool little system where, essentially, you buy some powdered plastic and superglue then use the two to fill in cracks. It seems pretty strong from the fixes I've done with it. You don't have this issue with the cluster but I would worry about those fixes in places that get exposed to water, where super glue doesn't do so well.

Cheers

GerritD

When you start the car, the BREMSLICHT = BRAKE LIGHT warning stays on untill you press the brake pedal.
It checks alarms coming from CWU. This is how it is meant to be.
So incase your Brake Pads are worn, after pressing the brake pedal, it will then generate an alarm that stays on in your dashboard cluster.
You only need to acknowledge it via the button on the center console so that the large ! goes out on your dashboard cluster.
But the warning light for Brake Pad remains on.

In my case I removed the bulb of the Brake Pad warning, so it cannot check if there is an error and no other alarm is generated.
All works with resistances of the circuit (incl resistance of bulbs)..

streetsnake

Quick question. I’m waiting for a part to come in for my LED pod. Until it comes in I can’t do the 4 jumper test to see if the “brake pad” light goes out. However, since I’ve gotten the 928, my CWS has not lit up at any time. My question, if I run a continuity test on the brake pad sensor “wire/line”, would it fail if the CWS wasn’t hooked up or defective?

streetsnake

So I pulled the CWS unit today. I was hoping it just wasn’t plugged in but no such luck. Is there a way to test this thing to see if it is functional? @Alan Or is it likely to just try a new one?