So ground wire, start anywhere i suppose?Where does ground wire hook up too?why you need to ground out your system?Only need 1 ground wire?
yes only one from the amp to the battery with an inline fuse
The ground wire in an automobile accessory installation is to make the complete circuit for the electricity to follow. Some things on cars use the frame and metal panels for grounding, but for an amp and some radios you probably should not. The battery is grounded to the frame and to the engine.
Ground wires complete the circuit and need to be connected to metal on the cars chassis. keep the connections as short as possible. Clean all the paint off the area , use a wire brush ect to remove all paint to bare metal you can use existing bolts/ screws or install your own , use the same gauge ground wire as you use for the power wire