XM Radio Hardwire

[Dlight26]

Hi everyone. I recently purchased a XM Radio and i would like for it to turn on when i turn on the ignition. I hardwired a radar detector to the dome light so i thought i would do the same with the radio. I decided to hardwire it to the OBC because i wanted to mount it down where the shifter is so it wasnt in the way. After doing this i realized that the OBC is always on which is why when you push the HR/DATE button it lights up and tells the time. Stupid me. Anybody know where i could hardwire it to behind the OBC??? There is another group of wires back there but i dont know where they go or what they do. Thanks

[Bimrpwr]

just tap into the cigar lighter..and then you wont have to worry about messing up the OBC

[Dlight26]

The cigar lighter has constent power also doesnt matter. i want the radio to go on and off with ignition.

[Bimrpwr]

then pull your radio out and tap into that. much safer bet then messing with the OBC wires. IMO