Ahh, my apologies...Ok, foil insulation: Basically its wrapped around two plastic insulated 18guage strands and the wire ground. The wire ground is not contained in any plastic insulation and buts up against the foil. Around the foil is gray plastic insulation. Its basically like a heavy insulated R...

I appreciate the response.I used a switch without a relay. The swicth is located basically in the pocket below the gear shift lever. That is also where the XM plugs in.I used insulated 2 conductor wire plus ground. Its basically two 18 gauge wires, plus a ground lead, all wrapped up in a aluminum in...

Bringing this back alive... I did the modification to get my MyFi XM radio into the stock radio. All is fine as long as I do not have the MyFi plugged into the power source. I tapped power and ground in directly from behind the radio, but when connected, i get a high pitched whine that DOES NOT chan...