Ok, I have a dual battery setup w/ a marine battery switch, here is it Here is my problem: The alt. doesn't seem to be charging battery 1 with the truck running and switch on ALL bat. 2 shows like 14v, and 12 V on bat. 1 w/ truck running and switch on battery 2 same as switch on all, 14V @ bat. 2, 12V @ bat 1 w/ truck running and switch on battery 1 12V at both batteries w/ switch in off position (haven't tried it) Why is this happening? My guess it has something to do w/ the fact that all the wiring for the truck is still hooked up to battery 1. I haven't moved any of the wires for the rest of the truck, they are all still hooked up to the starter. I'm not sure though. Thanks for any help!