im installing a hard wired sirius tuner in my 2000 gxe, it's the pioneer specific tuner (pioneer headunit installed)...I initially ran the power wire for the tuner directly to the battery, but I had to extend the power and ground wires to reach under the hood. Power was cutting out over bumps so I assumed the point at which the the provided power cable and the extension cable were connected to one another was being rattled loose. I decided to move the power wire from the battery to the fuse box inside the car. I piggybacked the power wire to the fuse for the interior dome lights. The sirius worked but the dome lights and my power door locks went out. I replaced the fuse but still nothing so, my first question is how do i get my locks and lights working again and second what is the best place to hook up the power wire for a constant 12v source...if the fuse box is best, which fuse should tap into??? Any insight would be appreciated.

 

Why do you need a constant 12v? Wouldn't you only want power when the car is "on" or "ign"?

Did you check the bulbs to see if they have been blown?

 

Ignition harness is a favorite among seasoned professionals. Accessory wire is what i would use.

 

The best way to fix things is to start un-doing what you've installed and get everything working again (replacing fuses or whatever else) then start fresh. That is, unless you can find the blown fuse without having to undo anything you've done.

You can tap your power behind the radio or at the ignition harness, although the radio would be easier since you have to get back there to plug the tuner into the radio anyway. There isn't a factory ground in the harness, the factory radio grounds through the chassis itself, so if you are going to tap into wiring behind the radio, just screw your ground to bare metal.

To both you and the above posters, you were right in tapping constant power. Pioneer runs their switched power through IP-Bus, so constant and ground are what all Pioneer add-on modules need.