AutoMD shows us how to replace a proportioning valve. To resetopen a bleeder on the end of the car with flow slowly depress the pedal when the light goes out close the bleeder wa la reset.

Proportioning Valve Reset Switch Corvetteforum Chevrolet Corvette Forum Discussion

The reset button usually has a rubber cap on it.

How to reset brake proportioning valve. Disengage the emergency brake. Inspect the brake pressure. Wiggle the brake light warning switch wire on the top of the proportioning valve making sure it has a tight clean connection.

If the pressure is restored to the brake line and your brakes seem to be working properly again then the reset button worked. Once you repair the leak reset the proportioning valve by starting the engine to get maximum boost and press the brake pedal as hard as you can for a few seconds. Now I cant get any fluid out of the front bleedersHow do I reset it.

It will have one or two buttons located on it. Master power brakes says to hook a test light to a 12 hot and touch the warning switch on the pv if the light is on it is tripped if off its ok. See pg 82 for valve identification Whether or not you take the additional steps to inspect or diagnose a vehicles hydraulic proportioning valve will depend on the following.

Quite frankly im at a loss and I dont want to get a new valve if I dont have to. Push the reset button located on the valve with your fingers which will reset it so the valve is working properly again. Locate the brake proportioning valve near the rear brake line.

There is no reset on them. Inspect the brake pressure. If this doesnt work you will have to replace the proportioning valve.

Taking the switch out and using a screwdriver to push the valve back to center is one option you can also push on the rubber boot on the side. That should equalize the pressure on either side of the piston inside the valve body and cause it to slide back into its neutral position. Locate the brake line on the valve that leads to the rear brakes as well as the two single lines that lead to the left and right front brake calipers.

Lift the vehicle with a floor jack and place two jack stands under the front part of the frame and two jack stands under the rear frame. This week we crack open a disc brake proportioning valve and distribution block from a 1969 Mercury Cougar to show you how to service and rebuild yours. Tap the proportioning valve with a tack hammer several times lightly -- sometimes this frees up a corroded bore and piston spool inside the valve.

I just changed front brake hoses and calipers on my 73 Monte. Im thinking the proportioning valve sensor got pushed to one side when I bled the system and now it cant reset. Any comments and help would be greatly appreciated.

I cant get the light to go out unless i do the small pointy thing in the switch hole but that dosent last long. The brake light DASH stays on most of the time not if I punch the peddle fast. In response to TAT_2.

When I went to bleed them it tripped the God forsaken proportioning valve. One component often overlooked is the proportioning valve. The proportioning valve may be a stand alone valve part of the combination valve or built into the master cylinder.

Looking inside the combination valve will make it clearer. For older vehicles the brake proportioning valve will be located underneath the vehicle usually attached to the side chassis frame or to a floor panel support bracket. The proportioning valve is typically located close to the brake master cylinder.

The proportioning valve determines the percentages of brake fluid directed to the front and rear brakes to ensure safe braking. Bob Wilson owner of RJ Restorations explains how the proportioning valve functions and demonstrates the process of rebuilding one. It helps to distribute the proper hydraulic pressure to the front and rear b.

The switch in the center of the combination proportioning valve is the one you want to reset. What will work sometimes is to completely remove the brake light switch assembly from the valve and slowly push and release your brake pedal a few times. New price will likely scare you so head for the scrapyard.

Then reinsert your brake light switch. Push the reset button located on the valve with your fingers which will reset it so the valve is working properly again. Using the PV Tool from MBM this video shows how to bleed your proportioning valve correct.