Hi Ron,
I too have a 98 AWD. I too, decided to fix myself, but re-considered when I found the fault. Most of the 98 cars have the same problem. Poor PCB material on the controller card. Mine had cracks running completely through the card, so it would be difficult to patch all the broken runs.
The new controller has a PCB with completely different material, and probably will not crack.
An indie in Arizona told me the problem was not the wheel sensor, after running a brief check. No charge for that one.
One more note: after going through all of this, my extended warranty paid for the diagnosis and replacement, at 80,000 miles.
Regards,
Mike Harris in Sandy Eggo
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