Head light switch replacement (headlights will not turn on)

[MGVFD]

Hello, I replaced the old digital headlight switch after it failed. I use a manual three lever switch. When I turn the lights on the running lights/ tail lights come on but no headlights? Are the headlights on a separate fuse?

 

[MGVFD]

Ok I have been searching and I found this thread.

quick headlight question for the FMTV/LMTV

Are the headlights on these trucks 12 or 24 volt? A guy is selling the LED headlights which are 12 volt and lists them for military trucks like these and the humvee and I know the humvee uses 24v headlights and I was trying to tell him most military trucks are 24v with regards to headlights.. Am...

www.steelsoldiers.com

I will check K7/K8.

 

[Ronmar]

A0 lighting ckt. Basically the same throughout the versions, with the exception of the brake ckt. On the A0 the pedal pressure switches provide a ground, in the A1s they changed to the switches providing DC power…

 

[MGVFD]

I have a question, When I changed the switch to the three lever switch there was no place for the ground wire. Could this be causing the issue?

 

[Ronmar]

I have a question, When I changed the switch to the three lever switch there was no place for the ground wire. Could this be causing the issue?

Probably not. The button lights switch is a powered electronic control device that consumes power so requires a return/ground path for its operating current to flow thru. The 3 lever is simply electrical contacts, so no ground required…