Join Date: May 2009
Tom Waite is offline
ABS light, No speedo, Trans won't shift out of 1st, and no power to brake fuse
1994 GMC sonoma. 4.3TBI auto trans.
Truck will not shift out of 1st gear, speedometer won't work, and the ABS light is on.
Everywhere I look online says to check the brake fuse. It is good. So I checked replaced the VSS. Nothing changed. So I checked the VSS buffer. With the ignition key on, I do not have power TO the buffer. I also do not have power TO the brake fuse.
If I unplug all the ABS, the ABS light goes out, but none of the other symptoms are fixed.
I have seen these same symptoms hundreds of times on GM vehicles online. NONE of them I see have a total lack of power to all the speed related stuff. I am at a loss. What do I do next? What is there left to check and how?
Recently, we replaced the ECU. We had damaged the old one, and got a new one from another tbi 4.3 sonoma 2wd. I don't think the ECU is the issue as we have put a minimum of 1k flawless miles on it since. But who knows.
94 Sonoma. Dropped, loud, and chipped/
90 Volvo wagon. Don't laugh, I wouldn't