Wiring Rydeen Duo Backup Cam to Pioneer HU
 

Just brought the BRZ to get my Pioneer 4000 NEX installed and was told that the Rydeen Duo won't work with my HU. Was wondering if anyone had any suggestions as to how to get it to work. Is there a wiring harness of some sort? Currently using SVXdc's wiring harness with the backup cam on the stock headunit.

Also, for the radio antenna do you suggest using Scosche LSAAB Antenna Adapter for 2002-Up Dual Lexus?

not familiar with the cam, but based on this thread I'd say its def doable
http://www.ft86club.com/forums/showthread.php?t=34942

yes I think that's the antenna adapter you want,
see this thread:
http://www.ft86club.com/forums/showthread.php?t=16137

The HU has an RCA input. You just have to connect the RCA connector from the Rydeen to the HU, then connect ground and a switched 12V+. The HU already has connections for the reverse sensor wire in it's harness. I would find a different installer that actually knows what they're doing or just install it yourself as it's not difficult if you take the time to do your research on where to tap for the different signals you need.