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I Installed one of my Christmas gifts. I had run an amp on signal wire and RCA's and stashed them inside one of the dash speaker grills. I forgot I crimped an unstripped wire for amp on signal to protect it from shorting. So when I added the next length to the crimp into the trunk I had no conductivity. I went back and tinned the end of 4g wires for the terminal ports because the stranded wires left gaps when it flexed. 4g wires didn't want to fit but after tinning I use a metal file. I also added some duct seal under the broken plastic cover for the main battery breaker on the side of the battery box.