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Hey all just had a question that I was wondering if someone could helpe me out with. I was recently Installing an XM radio system in my Deville. I found a power source from the light in the ashtray and a ground in the back of the radio (a black wire) Anyways I got it all hooked up and when i was driving around I realized that none of the Buttons on the dash light up, or the lights on the dials etc on the radio do either. The power window buttons on the doors light up though. Anyways So i took everyhting back out and hooked it up the way it was and they still dont work, the only thing that i noticed was that the light bulb in the ash tray is burnt out, Im hoping that that completes some type of circuit and thats why everyhting is not lighting up???
By the way the Radio does work fine and everything else works fine just the buttons on the radio, dash, heater controls and the buttons on the steering wheel dont light up. Any suggestions or ideas?? I checked the fuses but there seemed to be nothing in there. Thanks
 

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I'm going to COPY this into the "Infotainment" section. It might get noticed a little more there being it's got to do with your radio... I'll also highlight this topic so that it gets noticed...
 

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2005 CTS-V, 1994 Infiniti Q45
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Maybe you acidentally pulled a wire when you were hooking everything together. That is my only idea. The thing with the ashtray may work, but i dont think it will matter. You can have bulbs burn out all the time and all the other stuff would work. Personally, i dont think cadillac would be that stupid.
 

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Does anyone know of anywhere that I can see a wiring schematic of the wires behind the radio??? Because it was a black and a red wire that I cut behind the radio and then ended up hooking them back together. Also I replced the bulb in the ashtray and it seems that the light in the ashtray doesnt light up either. So I am really confused right now. It seems that the backlights for the buttons on the dash, heater controls, radio, steering wheel, ash tray light and the heater controls for the rear seat are all on one circuit or something because none of them work. I wish that it was just a fuse or something. Any ideas would be great thanks for the help so far.
 

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R-6.............What year Caddy is it? Did ya check the fuses ?
Depending on what year yours is there is 2 fuse centers.
Under the dash, under the hood, or under the back window
in the trunk.....Check you owners manual for locations.
Ya might get lucky and only blew a fuse.................geo
 

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Regarding the radio lamp problem -- a couple of notes. First, I have much experience related to car radios, but I'll admit my specialty is with vintage cars, not modern ones. So don't take what I say as gospel -- these are just ideas.

Regarding power to your XM, are you certain that the black wire you connected to is ground? Possibly modern units have ground wires, but if so this is new. Older units are all grounded through the case. Also with new stereos, amps are bridged together, so speakers are not grounded. If you somehow tapped into a common wire, it may have 6 volts DC on it.

I'm also concerned that you connected the XM to a lamp. Most dash lamps are routed through a dimmer, which varies the intensity of the dash as you adjust the headlamp switch. An ashtray light may not go through this circuit, but it may be controlled with the sensor on the dash that activates the twilight sentinel. Better to locate the radio power, and use it for your XM.

Now -- how do you determine which radio wire is which? Most Delco radios have a legend stamped into the metal case of the radio. If you can't see it with a flashlight under the dash, you might need to pull the radio out -- but you should find your answer on the case, somewhere near the connector(s).

Hope this helps. As for why your lamps are not presently working, I can't tell you -- but I'd start by retracing your steps.
 

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I had the same problem in my DeVille. The last idiot who owned my car decided to put fuses that were too powerful. The radio, the door chime, the dash, all that stuff was gone. That sucked. Try the fuses though.
 
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