Yesterday I finished up my dual battery set up. Very simple two red tops with a isolator to keep them seperated. The only thing on the truck that will be getting both batts is the 24v winch. After i got all the wireing done it will not start. It will try to turn over and the gauge says it has all the juice it needs but it wont start. I think the fuel pump is not coming on, I also noticed that the headlights dont come on, but the turn signals and a few other things still work. So what will cause only some of the stuff to work????