Hi all,

Installing an an XM radio tuner and using the adaptor for the changer in the trunk.
I will need a 12v ignition switched and probably a 12v constant.
Whats best to tap into?
I have owned this car less than 24 hours so not too familiar yet.

Thanks!

 

what car?

and if your using the cd changers wiring shouldnt it have the power wires you need?

 

The car in my sig, 2000 S4.

I am told the adaptor does not support power.

Thanks

 

would you have a problem running a 12v power from the fuse box?

 

I was trying to avoid the wire run to the fuse box but that is what I planned to do if there was no better way.

 

It's really easy to run a 12v power supply from the battery. I ran mine through the ECU box under the molding and into the trunk. Took all but 30 minutes to do it.

 

Thats what i did when i was installing my boost gauge only i went to the dash.

 

if i was putting a boost guage in a vent, (the drivers side) does the wire harness that goes to the back of the vent have a power wire? because it does light up the vent wheel...?

would like to get around running a new wire for a boost guage...

 

Under the knee bolster is a 75x power post which is "switched power" - best place to get it. Only on when ignition is turned on (or in accessory position).
I ran a wire from that post to my boost gauge in my vent install. I ran all kinds of crap off that 75x post.

 

im sorry, knee bolster?