The firewall will need to be drilled and you need to put a grommet in there to protect the wire from chaffing. Be VERY careful around the drivers side as I've seen people drill the brake booster, drill through wires on the other side, etc, etc. If you have an aftermarket radio, the remote needs to go to the (typically) blue wire with a white stripe. This is a wire that becomes active when you turn the radio on, and it turns on the amplified sub. Lemme know if I can help with anything else...
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