I got my head unit back from repair today and reinstalled it myself. I think I missed something though because the XM is not working. The head unit is a pioneer XM ready unit and has an XM receiver box seperate in the trunk. Wireharness attached to deck? Check. RCAs attached? Check. Amp power on attached? Check. FM antenna attached? Check. XM link attached (square)? Check.
Everything works except XM. Did I miss a connection?