ABS light kinda random, nothing seems broken

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Deathacus

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Hey there! Got a bit of an intermittent ABS light on the '94. A couple of times it came on while i was driving, and stayed on 'till I shut the car off. Now it seems to come on almost every time I start, but after a minute starts to flicker until it goes out. The ABS seems to be working just fine, both with and without the light, and it always performs it's self test at startup no prob.
I did pull some codes of of here recently, I checked all the sensors and resistance and voltage are fairly consistent, and well within the spec book. only thing was I noticed my rear right tone ring was starting to rub the sensor from all of the rust scale. but i spent a while with a hammer, screwdriver and wire brush to clean it up. Not great, but you can still see the teeth and no more rubbing. But since the light comes on even when parked, I can't see that being the only problem.

Here is the list of codes I pulled, although I haven't rechecked since messing with any of it:
31, 35, 36, 38, 37, 62, 75, and the Powerball number is 666
 

Deathacus

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Yeah, looks like it's not happy with any of the sensors, but the sensors themselves test fine.
 

Deathacus

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Rechecked the codes and now I only have code 33. Testing with my multimeter through a breakout box shows slightly lower voltage while spinning the RR wheel than spec. I already replaced the sensor, but had to chip a lot of rust off of the tone ring, so my next guess would be to replace that. Shame since the bearing and studs are still good. I think the other problems might have been due to a dying battery. Sometime the fuel and temp gauges don't work right for a minute unless I have my charger hooked up.
 

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