I just leased an RX 330 w/out nav and w/out ML sound system. I am trying to wire in the XM Commander and need to find a constant power and ACC power wire. Anyone know which ones on the back of the radio to tap? My guess is the blue with black is ACC and the thick red one is power, but I figured I would check before blowing up the new ride. Thanks.

 

I put in my XM Roady. And I just tapped into the back of the cigarette lighter. The radio wiring was too hard to get to. Do you plan on using a cassette adaptor?

 

The XM Commander uses a powered FM Modulator. I used an ohm meter to find the constant wire to the stereo, and used the back of the cigarrete lighter for switched and ground. I would have just used the cig lighter, but the Commander requires constant power from the battery for its internal memory.