Proportioning Valve is stuck
Brakes work great on the front, the rear is nearly any brakes at all. I jacked all wheels. I crank it, put it in to gear and with all my might to stop the rear one wonder right will not stop. Is anything to take the proportioning off and clean it? A friend told you could hammer on it, sometimes the little ball and spring may ever work again. I pulled the speed bleeders and I got a little hydraulic to the rear. If all that, I may have to buy a new Proportioning valve. If the valve starts right, I then will have a stop lights too. I also bought a Tractor Supply temp sender, the electrical original just would not work. The temp modified the housing for the 40 cluster with 3" (?) It looks just like the rest of the rest. It does just great.
I am concerned about the valve, I have two lines to front, and rear with the same.