85 Dodge pick up charging problems. I've got a brand new alternator. I'm not sure where the regulator is. There is an electrical box on the rear firewall of the engine compartment and there is another one on the right side of the engine compartment. I believe the one in the rear is the regulator and the one on the right side is some sort of switch. Can someone please help me? also my gauge doesn't work in the cab. I check the wires they're good and but for some reason it's not working. I've got power coming out of my alternator but it's not reaching the battery. HELP!