so i recently bought a '98 ford contour with the premium sound package, and i am having some issues. when i first got the car i noticed that if i turned the radio up, the left side speakers would basically shut off. i figured it was the deck, which i replaced with a panasonic, but still same problem. the left side will randomly kick in and work for a few minutes some days before shutting right off. my question for whoever is willing to help, could this be a problem at the stock amp, or the wiring at the speaker? and if so, would you happen to know if there is a (-) and (+) to every speaker so i could attempt to bypass the amp or install a new one. i would like to avoid tearing the doors apart if at all possible. i am eagerly awaiting a response, and will give more information if needed, thanks.

sound like a loose wire atg the speaker... had that problem with my older vehicle or could be that the speaker itself it starting to go

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02 GRAND CARAVAN SPORT

SPEAKERS: -6 1/2" component from energy still to come concidering alternatives
-2x Massive audio CW12 in 4.2cf dual chamber square ported at ~35hz

Amps: -DD SS1
-KAC-745

Upgrades: -160 amp alt. maybe
-4 gauge wiring (done)
-0 gauge BIG 3 (done)
-sound deadning the shit out of the van somewhat not done yet
?????????