Another "brake help" thread...
Remember to check your Brake-warning system FIRST;
and prove the shuttle valve is correctly centered.
There are at least two other guys here that suspect the C-valve is the source of your woes.
>That Dash light is also grounded by the Parking brake. If your cables are known to not be seized, then pulling the handle is supposed to turn the light on. But if the light is already on, hop out and pull the wire off the C-valve, which should then shut the light off ...... unless the Park-Brake switch is already activated. This will sortof prove the system is working.
>Because of these factory shenanigan's, I just find it faster to ohm out the switch directly, and when the valve is centered there will be no continuity to ground thru it. See attached image in Post #7. Here you can see that properly centered the spring-loaded plunger on the end of the brake-switch is NOT touching anything and so the light remains off. But if the shuttle valve moves even a tiny bit, the plunger will ground back to the battery, thru the valve and valve-body, turning the light on..
>And you can also see that if the valve should travel all the way towards the front inlet, it will shut off fluid travel into the front brake system.
If this happened while you were bleeding the front brakes, then you can bet that the front brakes have NOT yet been bled properly...... unless maybe you bled the fronts first, lol.
The same happens if the shuttle travels all the way to the rear.
>Centering is by cracking the inlet fitting on the opposite side of the non-working system, and gently pressing the brake pedal until the light goes out. then tightening the fitting back up.
>Now, if you do not have a high hard pedal after centering the valve, I would suspect the front system will need to bled again ( but it could possibly be the rears). Normally the shuttle will stay centered, unless you pump really hard, like as you would in a panic braking situation. And if the light does come on, you now know how to turn it off by centering the valve.
>Once the system has been bled, you can see that both sides of the valve get the same pressure from the M/C, and the valve should stay centered.