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I was going to put a system in my 2k3 coupe. I was looking at a wiring diagram and you run a power cable off of the postive terminal of the battery. Do you do anything with the negative battery terminal? I know that you run ground wires from the amp to the body of the car to ground. The only reason I ask is I was looking at wiring for a system and i am going to use stinger products. Why do they sell a negative battery terminal if there is no use for it?

 
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maybe to improve factory grounds? or else just to make money

don't run the wire all the way back to the battery, you only need about 2 feet of ground wire really. i think you know this, but just wanted to be reassured.

 
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Thanks