Badger Bob said "I also noticed a light under the dash, what the heck is that. Then I turned the key on and it lit up. I guess so he wouldn't forget the key was on. LOL"

If the trucks running a alternator the light could be there to excite the alternator. Once the truck starts up the light should go out and the alternator starts charging, regardless of engine rpm.

RonR


RonR


1951 3600 with Clark flatbed, T5, 4.10 rear
1970 340 Duster
1990 5.0 V8 Miata (1990 Mustang Gt Drivetrain)
1964 CJ5