Well, same deal here: rev counter died for a few seconds, then the abs light came on. After a certain speed it comes on.
I tested the relay, which is fine. So the next, logical thing to do was to get the sensors out and make sure they and the toothed rotors were clean.
All went well, the front ones came out easily.
The rear ones however, certainly did not:
The aluminium did a good job of 'assimilating' the sensor. It wouldn't budge a freakin' mm. So the top came off and I had to drill, cut, hack and scrape my way through it. The white stuff you see at the edge of the hole is presumably oxidation material. The center of the sensor is pretty tough material too.
After quite some hours of taking out bits and pieces all is well:
When ordering new ones I noticed that I had the -00 version of the part, with a metal casing. The updated -02 one (as mentioned in the PET) has a plastic casing. For a good reason I guess.
So if you got a '92 with the original ones still in there and one ceases to function, you are in for quite some fun!
One done, one more to go. Luckily the retainer bolt of that one snapped too, because I like drilling steel bits out of aluminium.
Holy crap.