Just got a Chrysler 300c and noticed the previous owner had a sub and amp installed as all the wiring was there, my brother had his nice old set sitting in his garage and let me have them, i installed everything properly ( I think) and it works fine, but when i turn the key off a large BOOOM comes from my Sub or whenever i unlock the trunk with my remote, this has never happened with my brother and im wondering if this is common or if theres a fix?

ground is probably bad.

can you post pic of how its grounded?

Step 1: Check Grounds

ill try take one tommorow, but i grounded it to the frame, same place the battery is grounded.

are you saying the amp ground is ran to the same spot as the battery ground?

cause that would be the problem

yeah, why is that bad?

E: its the same bolt i have them both on.

This post was edited by Fort on Sep 10 2011 01:36am

ya you'll need a separate ground for the amp.

Amp ground should be 3 feet or less.

jesus fuck bro

Ground to the chassis of the car. Sand the paint thoroughly off the area where you will attach the ground. Be sure your ground AND power wire are a large enough gauge to accommodate your amplifier.