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Howdy, newb to the forum. I've got an ABS code thrown on 3 of the four wheels Front left, Rear Left and rear right, all Open Short circuit to Positive.

I replaced the sensor on Front left and code came back. Does anyone have suggestions on how to test the abs module? test light on wires? I have Bentley manuals so I have access to wiring diagrams.
 

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Check the internal resistance of the control unit.
ABS unplugged, measure the resistance of each wheel-speed circuit in the module. I don't remember what the 'good' range is - but, because you have one non-faulted circuit, you have a point of reference to compare the other three to.

If it's faulty (and, it wouldn't surprise me), send the module off for repair (e.g. Module Masters, CheapABS), rather than trying a used module of dubious condition.
 
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