Lmtv1078A1 24 volt on 12 volt side

[Suprman]

The early A1s use very similar dash panel wiring and connections to the first gen trucks. Same with the polarity box. With the C7 came data bus and advanced polarity box.

 

[pangea]

Gentlemen, I do believe the man who put that electronics file on the board needs a promotion. Thank you so much.
Tomorrow I will fix this.

 

[pangea]

So , I realized I told you all 1078A1, the truck is actually a 1079A1 sorry. My 24 volt on 12 volt issue has been resolved. Who ever put the surefire arctic heater in the rear box wired it wrong. Thanks to the wiring diagrams I was able to figure out the "work light" fuse and the "arctic
Heater" relay were tied together on a solenoid that was wired wrong. My starter solenoid was wired wrong to. So sometimes knowing someone has you're back gives you all the strength courage and confidence to tackle something of this magnitude. Thanks. This truck was electronically demilled.

 

[DiverDarrell]

Now you know why they got rid of it. Easy day.

 

[coachgeo]

Congratulations on persevering with determined Sleuth to find the faults so you could solve it.