Ford F53 V10 will not start - Any ideas ?

We used the. Good Sam road service on a Friday afternoon while sitting at a rest stop west of Chicago. They sent a mobile mechanic who arrived in 45 minutes and who really researched the problem and traced the bad connection and fixed it in 50 minutes and we continued our trip. I paid the service about $ 150 which was very reasonable. Excellent mobile mechanic. If not for him we would have been towed to a garage and probably would have spent the weekend there waiting for a mechanic on Monday.
Good Sam and the service provider were great. In this case.