Well thats good to hear that you are an electronic technician. Makes it alot easier when posting information for you, I don't have to try and explain every step.
Here are the wiring schematics for the systems you are needing.
Now the main thing you need to concentrate on is the GEM module it is tied into both of the items you have here .It is located right under the radio and you may be right on about a wiring concern.
Here are the schematics for the GEM
Here are the schematics for the radios
Here is what fuse 26 feeds
Here are the instuctions to remove radio and GEM module
Remove the radio chassis Remove the center instrument panel finish panel.
- Remove the screws.
- Remove the center instrument panel finish panel.
- Disconnect electrical connectors.
Remove the generic electronic module (GEM)/central timer module (CTM).
- Remove the screw.
- Disconnect the four connectors from the GEM/CTM.
- Remove the GEM/CTM.
Now one thing I need to point out to you is the GEM is a module or computer operating on a windows based operating system. So think of it like your home computer, is something keeping it from going to sleep or screen saver like something activating, like moving the mouse so to speak. Look at all the inputs if you do not find nothing at the radio.
If you need pics of the connectors at the radio let me know and let me know which radio it is that you have.
Edited by Chuck on 1/4/2010 at 1:28 AM EST