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Abs Light 2003 Sonoma Zr2

rmmagow

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rmmagow Enthusiast

rmmagow

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I just completed a rear brake job on my truck. Rotors, pad and calipers. I only bled the rear brakes using the pump the pedal method. All seemed OK and the first test drive all was good. Today the ABS light came on. It cycles normally when starting the truck and the light is off until I move forward. It come on and stays on. It still cycles normally when I stop and restart but the light comes right back once the truck starts moving forward at anything over a couple miles an hour. Did I screw up with the bleeding? Where's the ABS pump and do I have to bleed that too? Front hub wiring looks OK, don't know where the rear pickup is located. Only other task performed was to adjust the E-Brake cable.

Advice sought and greatly appreciated.

PS Fluid level is fine and DOT-3 used from a new container.

wierdo124 Enthusiast

wierdo124

Posted
Posted
I just completed a rear brake job on my truck. Rotors, pad and calipers. I only bled the rear brakes using the pump the pedal method. All seemed OK and the first test drive all was good. Today the ABS light came on. It cycles normally when starting the truck and the light is off until I move forward. It come on and stays on. It still cycles normally when I stop and restart but the light comes right back once the truck starts moving forward at anything over a couple miles an hour. Did I screw up with the bleeding? Where's the ABS pump and do I have to bleed that too? Front hub wiring looks OK, don't know where the rear pickup is located. Only other task performed was to adjust the E-Brake cable.

Advice sought and greatly appreciated.

PS Fluid level is fine and DOT-3 used from a new container.

I'm not sure how the calipers are set up on that exactly - mine has rear drums. The bleeding shouldn't have anything to do with that, you do not have to bleed the ABS pump. I'd say you damaged the rear WSS. How many miles? Could be the tone wheel is shot.

rmmagow Enthusiast

rmmagow

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Posted

I fixed it. Turns out the ABS system in the rear is a damn good TPS system too! One side tire pressure was 4 lbs lower than the other, equalized them and no more light. Been driving for a couple of days to be sure and it's still out.

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