This is confusing so stay with me
I have connected the D3 to Sirius SIR-PNR2 to BTB-200 and both remain grayed out on D3 unit. I am sure it is connected properly; I even tried switching around the cables and units to no avail. I checked fuses and grounds, no problems. If I connect the SIR-PNR2 alone it works sound and all, now if I connect the BTB-200 alone I get nothing it is grayed out. Once I PROPERLY connect the BTB and SIR together everything is grayed out. BUT! Here is the tricky part if I improperly connect the SIR and BTB they light up as if they work but no sound from either.