Half of speakers not working

[French fry 511]

since I’ve bought this truck most of the speakers haven’t worked. It’s the factory 6 speaker non alpine. The back seat driver side is the one that works all the time and sometimes the front driver side (almost like it has to get warmed up before it works). The truck some aftermarket stuff in it before it came to me as I found some wires and a bass knob and a T-connector into one of the speaker wires on the driver side under the dash. I’m wondering what I need to do to fix it. Any help is appreciated thank you! 2016 ram 1500 8.4 non alpine 6 speaker.

 

[SitKneelBend]

since I’ve bought this truck most of the speakers haven’t worked. It’s the factory 6 speaker non alpine. The back seat driver side is the one that works all the time and sometimes the front driver side (almost like it has to get warmed up before it works). The truck some aftermarket stuff in it before it came to me as I found some wires and a bass knob and a T-connector into one of the speaker wires on the driver side under the dash. I’m wondering what I need to do to fix it. Any help is appreciated thank you! 2016 ram 1500 8.4 non alpine 6 speaker.

Unfortunately you'll need to start opening things up and inspecting it. Sounds like someone ripped their system out before trading it...