Originally Posted by willwren
Some of the earlier 90'* bonnevilles and some scantools had a little glitch. My Quad driver shows itself as bad on my scantool if I have my foot on the brake. This is during a realtime data scan, not just a code scan. Reset your computer, then drive for awhile, stop the car, and scan for codes with the foot well away from the brake pedal!
U did it again will! you are right ,some scan tools set code 26 if ur foot is on the brake pedal or even the e-brake pedal. like will said. disconnect the battery for about 5 mins , then give it a shot ,'' after you've driven for a while''. unfortunally on a 92 it wont pinpoint which quad is failing, but most likely it'* nothing