2005 4Runner SE / Non JBL
I recently installed a Sony XAV-AV100 with a PAC Audio RP4.2-TY11 adapter, both from Crutchfield.
Since installing, AM reception has been non-existent, and FM reception has been spotty. Reception for both was fine on the low-end JVC unit I replaced.
I've been around the track on this a few times. Before today, I made sure the lead coming out of the head unit to power the antenna amp was connected to the harness correctly. There appears to be voltage on on these wires at the point they connect to the vehicle's harness. I also have a Y adapter cable for the diversity antenna. Still, reception issues persist.
Today I took one more stab at this, taking it all apart and testing power, ground, etc. Then I disconnected what I have been thinking all along is the harness for the antenna amp
AM reception is better. Not fantastic, but better...maybe normal (?). I reconnected, and reception dropped again. Disconnected...better reception.
I don't know what to make of this. Is this indeed the wire to the antenna amp? Why would I have better reception if I'm ostensibly no longer powering it...unless my powering it was causing interference of some sort, and disconnecting it is now giving me un-amplified reception.
Any thoughts? I was stumped before, now I'm more stumped.