Originally Posted by
xirxious
I have one of the battery isolators that came from another truck, but have no wiring diagram. I think this just serves to keep the volts from dropping when recharging. Anyone else done this?
What year is your pickup? I've got wiring diagrams just need the year to post the apropriate one for you.
Some of the wiring is already there for a second battery. You just need a few components, and the "aux battery harness" from a donor truck.
If your truck has the underhood tool box, you will have to remove it as this is where the second battery goes on factory applications.
hope this helps...