2004 crossfire i can`t seem to find a grounding spot for a amp.is there a special place.or am i stupid ihave tore car apart.some please help me

 

in the back there really isn't a good ground point that I saw. I drilled a small hole and put a screw in it in the back panel under the carpet cover

 

yes there is good spots in the trunk to put a ground. Just out of sight under the carpet there is a steel plate that covers the gastank and is bolted on. use any one of those bolt locations along the bottom. Will provide a ground without drilling any holes. I will try and find a pic explaining where I am talking about and edit this post with a pic

Edit: I found a pic which shows where existing bolts are. Under the carpet where circled is bolt locations thats where I have mine. the little circles shows bolts in the pic that could possiable be used

 

tried both ways no luck.i know it works i have same system in other car and i swoped them other didn`t work either in the crossover this is driving me crazy i`ve put indozens of systems .thanks for the help.my trunk doesn`t look nothing is the same battery is up front.

 

If you have an '04 coupe your trunk will look exactly the same as this (minus the battery of course) this pic just has the side pannels removed and the foam peices in the floor removed also.

If you have a roadster I have no idea because I have never been in the trunk of one

 

still unable to find proper ground any other ideas

 

You could draw a ground cable parallel to the plus cable from the battery to the trunk.
I've done that in former times in a predecessor of my xf, because i've had big problems with hum and ground loops.
I know it's more expensive, but it's the safe way.

BTW: What is the exact problem? Maybe there are other causes.
Did you check the mass connection between battery and chassis?
Did you add a mass cable with the same diameter than you're using for plus between battery and chassis?

 

problem solved operational mistake.thanks to all that helped

 

thanks for the help