i just installed the swith on my 04 lly when i cranked the truck it says the battery isn't charging and i have low oil pressure what could of caused this, i appreciate any help
Make sure that you used the right pins on your harness and that they are making good contact. also, look at the tables for your oil pressure in efi live and make sure that the alert is not set too high.
Correct locations. I'd look else where for the problems. Tuning/switch will not cause low oil pressure or battery not charging. Now, the tune could have the glow plug timing all out of whack causing large voltage draw.
Might want to check all fuses incase something popped during switch install.
What is your oil pressure and does the voltage come up after a certain time.
Can you confirm this is a new problem, and not something you just noticed?