Question Asked: Brakes on a 1990 F-350 4x4 7.3 diesel. I have replaced the whole

it was a new after market from advance auto parts, but i am thinking of buying a new one from the Ford motor co.. I have checked for any possible leaks and have found0

yes, that is why I started doing the brake job to begin with plus the back brakes were locking up and the drums were wore out!

Then you need to know WHY the ABS light is on.. Scan test, don't guess!!!.. Does it have RABS only??.. I use block off plugs on the master cylinder line ports to TEST master cylinders!.. Can be made from 2 old lines crimped, soldered or brazed shut!.. That will tell if problem is master cyl or not!!!... Can also use a pinch off tool to clamp closed the rubber flex hoses for additional testing...if you are familiar with testing procedures. good luck with it!

Thanks Pushrod I'll give this a shot and let u know if it works

Ok