No, I ran the 12V from a new circuit directly off the battery with a switch.

I programmed my 03 Dodge 3500 Cummins for tow mode using a Predator U7130 with 9r05 software and had no problems. Later, after installing an EGT probe (Autometer) about 2 inches above the turbo flange, I noticed that the check engine light would stay on. This still happened when I set it back to the ...