Ford E450 V-10 Engine HELP

We have the Good Sam's Roadside Assistance and when have been on the road and had a problem they first asked if we would talk to one of there techs to see if we could trouble shoot it ourselves and when that did not work out they located a mobile mechanic and paid the service call for them to come out and we then paid labor and parts. The last time this happened the mobile mechanic found and fixed the electrical problem in less than thirty minutes and his service call included the first 45 minutes of labor so there was no labor charge.