At wits end, headlights on engine quits

[vinceM920]

Guys I have an M920 that runs every day. When I pull the headlight switch on sometimes it kills the engine, sometimes your going down the road and kills it. I have looked everywhere for a short. I cant figure this thing out. Is there a self setting relay that could be bad??? any help would be greatly appericiated.

Thanks

 

[Floridianson]

Ouch not a good thing to have happen. Do you think it could be a poor ground system between all componets ie cab and chassie / motor. Hope you get that one figured.

 

[Coffey1]

New kind of emergency cut off switch. Not to be found in TMs (top secret)

 

[gimpyrobb]

Look for threads by Docfarmall. He had this issue in a 915(I think). If I remember correctly, it was a bad headlight switch.