brake idiot light will not go out

[blk00rt]

I just changed the brakes on my dart.
I did drums all the way around. I changed the master cylinder and bleed all the lines. I have full pressure to the lines yet my light on the dash will not go out. I checked the connection at the prop valve and its on and fine. Yet still nothing. I have messed with the sensor a little near the brake pedal and still nothing.

Any ideas?

Thanks

 

[RedFish]

sensor at the pedal ? must be the switch for rear brake lights you're refering to and not a factor. The switch on your park brake mechanism turns on the same "in dash" light

 

[6pk2goDemon]

Any slim chance that your parking brake handle or pedal is partially applied.

That will also trigger the brake light.

 

[Burntorange70]

I just changed the brakes on my dart.
I did drums all the way around. I changed the master cylinder and bleed all the lines. I have full pressure to the lines yet my light on the dash will not go out. I checked the connection at the prop valve and its on and fine. Yet still nothing. I have messed with the sensor a little near the brake pedal and still nothing.

Any ideas?

Thanks

The wire going to the E-brake is a ground. Ground it out, The light comes on. Same with the prop valve. Ground the wire going to it, The light comes on.

Two things could be wrong. Ether you have a short in one of the lines and geting a false ground.

Or the prop valve could be senting a false ground signal to the light. (Even if the brakes a working right) The way to check that is to pull the wire out of the valve if the light goes out that is the probleme.

 

[Duster346]

Have you tried bleeding the proportioning valve? I've had to do that to get the light off before, believe it or not!

 

[2 Darts]

Switch on parking brake works like a door light switch. Has to be all the way in to turn off light.

Problems in proportioning valve possible are defective switch and a stuck piston assembly. Supposedly, restoring the integrity of the brake system should allow the piston assembly to re-center. Before I would take anything apart for re-build, suggest someone apply pressure on the pedal while another administers a few love taps on the valve to try to free up the piston assembly. Use care, the valve assembly is soft metal. Too much tapping will turn it into junk.