the brakes work good, however i have to continually add brake fluid. i could not find a leak anywhere, and pressure is good. i have been told it could be one of the following: brake proportioning valve antilock valve brake boosterhow do i test each of these and where is the antilock valve located? is there anything else it could be and how would i check it? i know i should have a pro do it but i am in college and can not afford that luxury.
to tell you the truth, unless you have just done the brakes or the brake light remains on when the parking brake is released, you should not add to the master cylinder. there is a sensor that is calibrated to turn on when the fluid level gets too low, and the fluid level will drop for one of two reasons. 1) normal wear on the pads and shoes requiring more fluid to push them to ward the drum or disk, or there is a leak. this leak you speak of that you can not find, a fun place to look requiring a little know how and work is at the back of the master cylinder. if you are both lucky and unlucky at the same time, you may see a trail down the vacuum brake booster behind the master cylinder. you may have to pull the master cylinder away from the booster to locate this leak though. my wife's car has this very problem right now. but i keep an eye on the fluid level and proceed with caution. as for an anti lock valve, does not exist, it is an entire assembly, but i am not familiar with where to find it on your vehicle of the top of my head.
Ok, so your loosing fluid.get underneath the truck and look at the inner rims and see if you have fluid residue, will probably be dusty, if none there, then follow your brake lines from the master cylinder to each wheel and look for leakage, if none then look under the drivers side dash and on the fire wall when the plunger goes through to the brake booster.do you see fluid.and then again, make sure that your brake system doesn't have any air pockets, if so, you will have to add fluid, until system is functioning correctly
The ABS equipment failure does no longer reason this subject, the ABS failure could in simple terms reason the wheels to fasten up like if it became into geared up without ABS. It sounds such as you nonetheless have air interior the equipment, rusty brake line or broken hose, or a defective grasp cylinder diaphragm. you will desire to have precise off the reservior, then park it on a dry pavement, get below the truck to verify if there became into brake fluid leaking from everywhere collectively as pumping, it ought to have saved you $$$ in changing the calipers and drum cylinders. yet gain this now and notice if its leaking everywhere,no count if it truly is then fix the leak, yet whilst no longer then re-bleed the brakes and then bypass after the grasp cylinder.
