tests indicate front right wheel bearing fluctuating causing abs and trac dash lights to come on. bearing has been replaced several times. suspect wiring. where does hub wire terminate?
Is an impact gun being used to tighten the axle nut?
Tester
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The hub end terminates at the speed sensor inside the bearing. The other end terminates at the ABS controller mounted on the ABS unit.
Why did you ask this?
OP seems to be thinking that since the hub/bearing ass’y has been replaced several times already, the ABS symptom OP is having isn’t b/c of faulty wheel bearings, but something else instead, possibly the wiring between the hub ass’y and the ABS unit.
Suggest OP take car to different shop and ask them to check by feel for bearing noise and/or play. Before mentioning the ABS issue. If shop says bearing is ok, if OP intends on a diy’er fix, OP will best serve themselves by obtaining the wiring diagram for the car.
A shop w/lab o’scope experience could monitor the signal as the wheel was rotated by hand. Compare one wheel vs the other, etc. That’s probably what I’d do if I had that problem. Tester’s idea about incorrect hub/bearing installation method is a good to consider too.
A scope isn’t necessary
A decent fluke digital multimeter will work just fine to diagnose this, along with that wiring diagram, factory manual and the connector pinouts
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Replace egr. Sort of a GM thing. Reduced power causes computer to have issues.
The trac warning light is probably the result of whatever is turning on the abs warning. But could the abs warning be related to the ECM detecting an engine or transmission problem? The reports here indicate IIRC in that situation, the ECM may turn on the stability control or traction warnings, disable the cruise control, but could it also turn on the abs warning? Maybe there’s a logical explanation, but I’m not seeing it.