Wiring Diagram For Brake Proportioning Valve. The outlet of the proportioning valve is connected to the line leading to the calipers. Early broncos had at least until 76 if not later used a switch with two wires.
By james walker jr. For example when the emergency brake is set the switch moves to ground which completes the circuit and the warning light illuminates. Note that figures b and c both generate 950 psi of.
There is no wire on a proportioning valve.
The proportioning valve only lets a certain portion of the pressure through to the rear wheels so that the front wheels apply more braking force. This diagram is the most common way to plumb a pro portioning valve. Proportioning valve diagram. 1 the proportioning valve in the prop block will be used to adjust the rear brake pressure of the vehiclethe objective is to balance the pressure of the rear brakes to the front so that under hard braking the rear brakes do not lock up before the fronts.