well CRAP!!!
Just spent a couple a hundie, installed a new accumulator and nothing has changed. Still have a brake light, still have a hard pedal, and no measurable differences.
I did the pressure down as instructed, checked the 30 amp fuse(it is good), exchanged accumulators, powered up the Buick and no change. What are my next steps??
Thankzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
What condition is your brake fluid in? Is it black, cloudy or crystal clear? Cloudy or frothy brake fluid is a sign that there is air in the braking system.
If it's not crystal clear, I would get a turkey baster and VERY CAREFULLY suck the old brake fluid out of the reservoir. Turn off car and pump brake pedal 10-12 times to empty brake fluid from the accumulator ball into the master cylinder brake reservoir before u suck out the old fluid. Be sure not to get any brake fluid on your paint- use a fender protector and towels.
Replace fluid with Valvoline Syntethic DOT 3-4. I once read that using Valvoline Syntethic cleared up the red brake light syndrome. DO NOT USE SILICONE BRAKE FLUID. The brake reservoir has 2 sections. Fill the section closet to the fender completely full. Fill the section closet to the engine about half full.
Then you will have to bench bleed the master cylinder and bleed each wheel cylinder to get any air out of the system. Look up zeus87gn sig for great tech tips on how to properly bleed the powermaster system.
If u are not using the GN for a while it's a good idea to pump the brake pedal 10 times after u shut car off. This will empty the brake accumulator ball of the brake fluid.
These Powermaster brakes don't like to sit- they like to be used. Fresh brake fluid every 1 or 2 years is critical.
I changed my brake fluid last summer and I just changed the fluid again this weekend bc the fluid was cloudy- I didn't bench bleed the master cylinder but I will soon.
U might have to change the fluid again in a few weeks after the fluid has had a chance to circulate the brake lines.
There are 2 different accumulators- the brake accumulator is the black brake accumulator ball that holds brake fluid as a reserve in case of an emergency brake failure. the AC accumulator or receiver/drier is a filter for the AC that has nothing to do with the brakes.
It might also be the brake switch. Hopefully it is not a black switch because those are the original ones that were recalled. Your brake switch should be gray and black - if i recall correctly- but there should defintely be some gray. Try changing the brake fluid first and bleed. Hopefully, this will fix the light. If not, then u have to read trobleshooting guide which is listed on gnttype.org website. there is a list of tests that u can perform to determine the problem- fuse, brake accumulator ball, brake switch, brake proportion valve, master cylinder pump motor.
Good luck- Research, read and be patient!
Frank