I installed a 6 disc factory radio into the 05 Ford F150 a few weeks ago. I hated the aftermarket one that the previous owner installed. All was well, it plugged right up and has been working great. Yesterday I went and picked up a 10" Boston sub and flush box for under the back seat. I installed the amp and sub no problems all sounded great. Today my uncle says the radio won't power on. Here is the details and the diagnostics so far.
Radio DOES power on, but only for clock functions.
The amp was hooked up via a line level converter which I spliced off of the back speaker wires behind the radio.
The remote lead was ran from the ignition wire from behind the radio. (Color was green w/yellow)
Amp is connected with 4GA from the battery to a distribution block to 2 8GA wires.
Amp ground is 2 8GA wires less than 12" long and to the chassis under the seat with the paint stripped away.
Sub is wired in 4OHM bridged, not that it is of any importance.
diagram I used to determine splices.
My thoughts are anti-theft. I checked the number 7 fuse and the number 33 fuse, both are good. I am not sure how to reset the anti-theft if this is in fact the issue.