Mr Powell

iTrader: (1)

Ok so we pinned out my harness and got rid of the body control stuff, etc... Well what we did was cut the #10 wire short and ran our own wire. It goes about 3ft or so then is Y's into the Tach and the Window Switch. The problem is the tach does not read, and the Window switch will not read either. We have everything soldered together, no butt connectors,etc.. The PCM reads a RPM reading... I have a Alcatron unit that can tell RPM and stuff via a wire, like if you wanted to see if a tach should be working. It reads the RPM perfect if it is connected to the wire right before it Y's out. So we thought maybe it was the Y that was causing neither to work, so we just made some little connections using butt connectors and neither unit works.

Is there something I'm missing. I have the wires cut on both parts so its reading as a 4cyl like it should. Both units have worked before, but now we cannot figure out why they arent now.

1STGEN68-2000SS

Did you use the white wire fom the ecm harness that is closet to the front of the car.
One more thing that you may try is to hook up the tach by itself and than the controller to make sure that one or the other is not shorted and killing the signal to both.
Alan