Hi all, my first post.
I just purchased a 1994 F600 for occasional use to tow my small backhoe (about 7K lbs) 60 miles to tend the private road at our camp.
The truck has somehwere around 55K miles and runs and drive very well.
It is 22,500 GVWR with a dump body.

The check engine light is coming on and off as I drive. It has sat for while prior to my driving it.

Is there anyway I can determine what is setting the light off? Looked under the dash and did not see computer plug.

Thanks all,
Joel