Autopage RS-750LCD Problem on 97 yukon

Did you tap into it?  connect any wires to it?  I was just trying to think of things that would cause this problem.  It looks like you are at the point where you need to diagnose where the problem is coming from.  It can be an annoying process, but it looks like your only choice now.   First make sure that all of the factory wires are connected, either through a relay or directly connected, then unplug the main fuses and see if that restores anything.  Check all of your door lock switches, the factory remotes etc.  If no improvement, then the problem would not likely be with the Autopage.  If it does solve the solution then plug in the fuses and try unplugging one wire harness at a time and test things.  if you can figure out which harness the problem is coming from then try cutting one wire at a time until you figure it out.  I have a feeling you will not need to  come to all of that though.  J Rilla

Owner/Installer

I have discovered something interesting... If I rotate the dimmer wheel to the position that manually turns the domelights on, everything works better. The OEM remotes work, the alarm remotes work: By this I mean that all the doors will lock and unlock. The same is true when using the switches on the doors, however, if you hold down either the lock or unlock side, the door will repeatedly lock and unlock the driver's door while the button is held down. Everything returns to the haywire state once you turn off the domelight... This leads me to believe that the driver's door actuator is ok, but whatever module that houses the controls for the domelights and OEM remotes must be messed up. Do you have any other ideas about testing this theory?

where did you tap the red wire off the 5 pin harness for siren and park lights ???

and the ground wire as well????

The ground wire is tied into the ground (crimp on circle-type connector) to a cross member that had two OEM grounds already there. The red wire from the 5 pin harness is tied into a 12V wire in the ignition harness. It is tied directly into its own wire as I added a couple of extra power wires when I tapped "both" the large-gauge 12V wires in the wiring harness. Thanks! --Jeff

By the way, pulling the fuses for the RS-750 didn't help any... --Jeff

and what color park light did you get?? also where did you tap in the locks??? and did you test those or just go off a diagram??? not be critical just trying to eliminate possibilities..

What color park light? What do you mean? I tapped the brown wire at the headlight switch for the parking lights... They work great. I have tried disconnecting this tap also. I got the door locks at the driver's kick panel from the switch on the right upright near the back glass. I tested this first with a DMM and then with a probe. Still have the same problem by the way... Thanks! --Jeff--Jeff

97 Yukon