Hi everyone,

I purchased a PT546-00121 to install into my 2011 Scion xB RS 8.0. It did have an aftermarket radio installed previously. I was able to plug it in and the head unit works nicely.
My question is what are all of the connections in the back for? I know the 2 on the bottom left are what's plugged in. I believe I need an adapter for the antenna as that's not plugged in yet.
Any and all info would be great. Thanks

 

The other plugs are for steering wheel controls, Sat Radio and USB input. I can't remember what year all the harnesses changed, but since you have an 2011 and needed an antenna adapter I'm betting it was 2012 when all the plugs changed. You most likely won't get the USB and Sat Radio working since the plugs are different and I'm doubting you have the Sat. module installed already. Steering wheel controls can be done but you might need to find an adapter harness.

 

Thanks Greg s for the info. I'd be interested in the steering wheel controls and the USB if possible. Anyone know which connectors those are for on the back of the head unit? Thanks