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Swank1975

1992 RRC ABS light on 100% of time even whey trying blink test

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Hey,

I've been searching all over for this one. I have a 92 RRC that I just picked up and we're going through it fixing a ton of carp. The ABS light is on as soon as the ignition is turned on and it stays on 100% of the time.

I've tried the blink test which involves removing the blue relay under the driver's seat, putting a paperclip between the black and black/pink wire and turning the ignition on. I've also tried this once the ignition is on. I've done full battery power resets, checked the ABS fuses etc.

My system pumps up to pressure and holds. I'm pretty sure all of my abs sensors are seated for air gap.

Has anyone seen this before? Any help is greatly appreciated.

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Whenever I have done the blink test I have never had to remove the relay. Just jump the wires.

When you say the ABS light stays on, do you mean even when you drive the car?....it doesn't go out until you go over about 5mph.

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I have tried this test with and without the relay in place. I've tried this test with the paper clip in place before turning the key on and after turning the key on. I've tried this test about 15 times thinking of any variables I could be mixing up. No luck.

From the time my ignition is turned to on the ABS light is on 100% of the time it never goes out when sitting or driving until I turn the engine off.

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OK.

You do need to get the codes read.

I assume that you are putting the piece of wire across the black and black and pink wires on the blue diagnostic plug which is usually at the front of the underneath of the passenger seat. (RHD car). And not jumping the wires on the relay.

If this is what you are doing, I would check the wiring to the diagnostic plug.

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Yes I am jumpering between black and black/pink on the plug under the left front seat and not at the relay along the side of the same seat.

I'll look at the wiring when I get a chance.

Thanks for the input.

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Unsure if it's the exact same fault but I had a similar fault that turned out to be a slightly corroded/bad connection in the fuse/relay box removing and reseating did the trick

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I am able to read the ABS code which is 28 but nothing I do will erase the code.  Every timedo the diagnostic the same code is there. Anyone run across this?

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You need to remove the fault code with a diagnostics reader - the fault is stored semi-permanently to ensure that the system is properly checked for faults, not just ignored if the light goes out on an intermittent problem.

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