It's a height sensing valve. If the vehicle is heavily loaded the rear end sits lower and the valve allows more fluid to get to the rear brakes. When lightly loaded the vehicle sits higher and the opposite happens.
try the brake switch on the back of the brake pedal
DOT 3
It is just above the brake pedal. The switch rests against the brake pedal lever.
Sorry, we can not do diagrams. - See Haynes Manual.
Low brake fluid and the parking brake being on are the two most common causes.
Pads only --approx. $30.00
Usually on the upper end of the brake pedal
e-mail millerannap@hotmail.com I will send you Diagram
After the proportioner valve, there is one for each wheel.
Just above the brake pedal. The switch sets against the arm of the pedal.
6"
Yes. The brake calipers are side specific.