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ABS light on

optima23

By optima23
in Ask A GM Technician

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optima23 Enthusiast

optima23

Posted
Posted

Hey guys well my abs light is on in my 2002 Chevy Silverado 1500 4X4.

 

The code that comes up is CO268. Pump Motor Circuit shorted. Just wondering what I can do to check things out and find out if the ABS pump is good or not.

 

Thanks Raymond

  • 4 weeks later...
mooreapi Enthusiast

mooreapi

Posted
Posted

Raymond,

I've had to replace my ABS controller twice due to corrosion of the pump power wires. ( I forget what message I got when this happened)

IIRC, you can get to the plug for the motor power wires to the controller unit (on top of the pump/controller assembly). unplug and check to see if the circtuit is open or shorted on the motor with a multi-meter. If open, you will get no resistance(analog)/overlimit(digital). If shorted, you will get a very low resistance, but not 0. If you don't get either of these extremes, maybe the controller is the problem.

 

I don't think that just the motor can be replaced without replacing the whole assembly.

 

Matt

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