I have a Willwood adj. prop valve. When I hook up the brake light switch it does just that lights the brake light.

How do I make it work right? Shoot what is right? What does it meen when the brake light is on and the parking brake isn't.

 

It means the internal switch is tripped. Hook the brake up and press the pedal really hard, light should go off.

 

What do I need to do?

 

Post #2 below:

https://www.thirdgen.org/forums/brak...ve-sensor.html

JamesC

 

Still no ideas how to fix it. I don't have any issues except the lite.
I fixed everything else. It used to come on only when I braked. There was a problem with axle movement. I fix that now the lite is on all the time.

 

I found out why it is on all the time. The 2 lugs were touching but now the brake lite comes on only when the peddle is applyed.

So it comes in because of a differential in pressure between the front to back?

 

The switch in the Wilwood proportioning valve is for the rear brake lights, not the dash light.

RBob.

 

Really Bob? I feel real stupid but the instructions are poor. So there is no break light switch. Was wondering why there are 2 spades off the back of the switch. I hooked up the wire and grounded the other.

 

You aren't the only one that has made this mistake, I've seen it on other forums. As for a pressure differential switch, there isn't one on the Wilwood proportioning valve.

Next time the brakes need to be bled I'd remove the switch and replace it with a pipe plug. It is a 1/8" - 27 NPT thread.

RBob.