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So when I put the key over to the on position all the dummy lights come on like they are supposed to and turn off. One of them says rear anti-lock. When I first got my truck I thought it meant that I had anti-lock brakes so I slammed on the brake pedal and believe me, all I saw was smoke and tire marks. That kind of gave me a little clue that they are not anti-lock. So what does that dummy light mean? Mine is not on but I do always wonder.
actually u do have rear anti-lock breaks. that I believe is since our rear end are lighter (especially on pick-ups) so this should help prevent the rear from spinning around during hard breaking.
The light comes while I am sitting still or driving braking or no braking. Its not just coming on while braking. I think the sensor gets wet and the water some how shorts the sensor out? The ligth will stay on and goes off when ever it feels like it.
i don't know if this will help but at one time my rear antilock light just stayed on. never had any braking problems tho. however i was removing some speaker wires and had to remove the threshold plate on the drivers side. there i saw a wire burned into. i spliced the wires back together with a connector and the light went out. easy fix for me.
I can't remember if mine started after I replaced the rear fuel pump or before. if it started after then I may have damaged the sensor. One day I will get under there and look. No breaking problems what so ever ewith my truck either.
I don't think the rear ABS is working on my 90. The light doesn't come on either. It comes on initially at startup and goes off after a second like its supposed to. I have hammered the brakes a few times and it didn't seem like the ABS did anything.