Dual Batteries question

[2015TahoePPV]

Is there a way to tie the dual batteries together so the truck can jump itself?

There's a relay on the firewall that seems like its part of that system, but I'd rather not create a fire experimenting.

thanks!

 

[Sgt__Z]

Everything I have found on these forums shows that the two batteries are already linked, for the most part. Some PPV/SSV's have a relay in between to keep one battery from draining the other, and on the other side the two batteries act as one big battery. I know that doesn't help with your question but there you go. You could always just disconnect all of the wiring from your secondary and connect jumper cables from one to the other. Just hope you don't fully drain it during the jump process. Hopefully someone with more knowledge will answer.