Quote:
Originally Posted by ztim
On top there is a white plastic ...bolt?...going into the valve and it has a wire coming out of the top. Around that plastic thing is a 1/2 inch black metal band that is free spinning but will not come off. I think it is to protect the plastic part. I tried to pry it with needle nose but it won't budge without braking. Now, on the bottom there is a bolt with a soft center that depresses very slightly. That is probably rubber but it doesn't seem like a switch. If it is a switch, how long does it have to be depressed? Held in?
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The "bolt" with the wire is the differential pressure switch that is causing the light on your dashboard to stay on. Just for grins, disconnect this wire. If the light goes out, the problem is in the valve. If the light stays on, you have a short in the harness someplace.
The soft rubber item is the cover for the button. It does not move very far. That needs to be pressed in while bleeding the brakes.