ABS help.

I've got both lights (amber Antilock and Red Brake) lid.
My accumulator has been replaced two-three years ago, but I tried another one with no luck. Checked the relay on passenger side, replaced with another one, same difference. Yesterday installed complete master cylinder and no luck here. Brakes are still rock hard. Both lights are still lid. I don't hear the pump to come on at all.
Please, educate me what else to check/replace.

P.S. ABS unit that I installed hasn't been tested. I was told it was good, but don't know for sure.
Thanks for your input and sorry for the long post.

There are procedures for testing things before you replace them. They have been documented here in various posts. The information is also available here:
http://www.35thatr.org/Tips/ABS.htm

Mike8675309 said:

There are procedures for testing things before you replace them. They have been documented here in various posts. The information is also available here:
http://www.35thatr.org/Tips/ABS.htm

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Thanks Mike, I m reading this article right now.
When you test the pressure switch, do you have ignition on and then ground pin 4 of the relay?
Thanks

Payton said:

Thanks Mike, I m reading this article right now.
When you test the pressure switch, do you have ignition on and then ground pin 4 of the relay?
Thanks

Click to expand...

I believe the key needs to be on.

Mike8675309 said:

I believe the key needs to be on.

Click to expand...

O.k. fix part of the problem. No, pump runs, I've got brakes, but both lights are still on. checked few accumulators, fluid level is fine. What else?
Thansk

It turned out to be an ignition switch. When it is not completely pushed to the right, it cuts off a circuit for the pump.
Thanks guys for your help and advice.

Silly us.. I've had that happen a number of times. The problem is that the ignition switch housing gets loose over time. You can tighten it back up with a combination of zip ties and/or bailing wire or... just buy a new switch. Oh, and in the mean time... just jiggle the switch when its in the run position and things should come to life.