Jerry I was thinking about your truck today, for the first time this past few weeks in my 18 years of printing we had a printing press that would start on it's own & not shut off even when emergency stops were pushed.
It ended up the main contacts went bad or at least that's what it seems at this point.
I got to thinking about your truck. I'm not sure if a main set of contacts/relay comes together to run your DC motor but I would assume it does & after seeing this first hand I just wanted to make sure you had some sort of solid throw off switch within reach just incase...Maybe the brakes would over power it & the odds are slim to none but you never know.
Just a heads up
Jerry hasnt been active in months...
Devo