I've had the usual ABS problems for a while now (ABS INOP, BRAKE, ASR OFF) and I believe I've narrowed it down to the ABS module since that's the most common problem on a 98. I bought an ABS module (hydraulic and electrical parts) from a salvage yard and plan to change it soon (was going to be today) but I need to know the process of bleeding the system after that unit has been replaced and currently has no fluid in it. I know the usual bleeding process for the calipers but wasn't sure what to do when a dry ABS Module is thrown in there.

I've also read something about you have to "home" the cylinders on the module before you can properly bleed the system but is that just on the 94-97 cars or what? If that does have to be done, does that mean I have to install it, trailer it to a dealer to "home" it, then bleed it?Any help would be GREATLY appreciated! Thanks a lot!

 

As far as I know you only have to "Home" the cylinders if you are taking the Motor pack off the hydraulic assembly.
That's the way it works on my 97 Z28.
When I replace the one on my car I just blead them at each wheel.
I also used a vacuum bleeder.
That just made it easier and I was able to suck out all the brake fluid.
So I knew for sure there was no air in the system.

 

Cool! Thanks a lot!

 

I got the module swapped out and the lights went off and the ASR worked...for about 10 miles. The the "ASR OFF" & "ABS INOP" lights came back on, but no "BRAKE" light this time so I assume that's good. It seems to reset itself every time you turn the car on, drive for a few miles, then the lights come back on. I'm thinking I may have to take it to a shop with a Tech II scanner and let them run it through cylces to calibrate it (at least I hope that's the problem). Again...we'll see...