It isnt any of those things. i have already checked all of that.. my ground is tight my fuses are good. Im almost positive its the amp..

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2003 Blue Fx-4 ranger.
Mustang dome light, blue/silver painted interior, Kenwood head deck and kenwood 6x8 speakers= Custom built 8 inch sub box with a 8 inch mtx rs, kenwood 160 rms amp. , Line-x bed liner,custom vinyl center console lid. Silver grill and fender flares. Personal Air box mod with drop in k&n filter, Dynomax Ultra Flo cat-back exhaust system. Working on exterior valance next than hood scoop silver and 4.0 stickers. This spring a full interior redo with seats. More to come.