Roy LaZelle

In my 89 944 S2, the ABS warning light now lights up when I start the car. I have checked the forums and found a bit of information. Apparently there are two checks:
(1) there is a self check when the car is started
(2) a sensor check after the car starts moving.
So, it looks like my problem is in the self check. There were also some posts suggesting that relays could also cause this. After looking at the circuit diagram for the ABS (section 45 page 04 of the manuals) in case the relay was bad, I pulled the ABS relay and jumped terminals 87 to 30 while the car was idling. It should have powered up the ABS and turned the light off... which it didn't. There are two more relays on the ABS Hydraulic unit, in the right fender, which I will check next weekend.

Could a broken sensor wire cause the self check to fail or are my problems limited to the Hydraulic unit and it’s power.
How about the testing unit a Bosch K7-ETT 016.00/VAG 1516 mentioned in the manual are those at the dealer only ??
Suggestions anyone ??? --Roy--

gregeast

On my 951 it turned out just to be the fuse.

Keeping my fingers crossed for you that that's all it is.