Hey everyone. I'm having issues with my new to me 2018 Ford F-150 STX 3.5 4x4 audio system.
When I purchased the truck I didn't notice the audio was only coming from the rear speakers. Since I've noticed I've come up with no solution to the problem. So far I have-
-Checked spark plugs
-master reset
-updated sync to latest firmware
-installed new front speakers and tweeters
-Pulled out the ACM and APIM from dash but not replaced with new ones (yet).
-disconnected negative terminal and reset the system

All to no avail. I am thinking about changing the ACM but because the rear speakers work I don't think it is the problem necessarily. Maybe I'm wrong. I'd really appreciate the help here. Not the most tech savvy guy.
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Have you tried the front to rear fade adjustment and or left to right?
Any of that working?

 

I have. I also ran a speaker test. The only sound I get is from the rear speakers.