Wiring problems of the 2005 Ford Ranger

Fuel shut off switch - the wire harness connecting to the fuel shut off switch are melted. Ford replaced one of these switches during my warranty period and since then I have replaced this switch twice. I now notice that the harness connected to this switch has wires that are melted. This switch has activated numerous times while I have been driving and when this happens the vehicle fuel is interrupted and vehicle stalls. I have had this happen on interstate 4 and on various other roads. I find it hard to believe that my vehicle is the only one this happens to. I recently picked up a new switch which has been revamped with an additional wiring harness and a new connection bracket. The problem is that the old harness that this will be attached to has bare wires exposed with no insulation covering them. I am concerned that this constitutes a fire hazard. I have spoken to the Ford service department in lakeland, FL. But have had no reasonable explanation on this problem.

Driving on i75 when engine stopped. I lost all power. Was able to coast off the road and onto the shoulder. After 5 minutes, truck started and drove home without any further problem. Continued to have same problem, didn't matter what speed I was driving or if I was stopped at a light, and it would stop repeatedly in one week or go for months without a problem. Truck would stop and would eventually restart within a couple minutes or up to 30 minutes after it had stopped. I repeatedly had to coast or push this truck from the roadway without any power steering. In early 2011, the truck stopped 3 times in one day. The third time it stopped in front of friendly Ford, monroe, mi. They kept it for 2 weeks but it only stopped running for them one time and it repaired itself before they could find the problem. In may of 2012, it began stopping multiple times in one day. It stopped and would not restart and I had it towed to crest Ford in flat rock, mi. They discovered the fuel shutoff inertia switch had failed and replaced it and the pig tail wiring harness. It apparently had overheated for some time and had melted the wiring harness into the switch. I paid $367. 94 for these repairs. At this time the truck only had 28,370 miles on it. The truck was used very little and was always kept inside my garage. The dealer told me to contact Ford for possible reimbursement. Ford told me they did not have a recall for this problem at this time but to keep my receipt in case of a future recall. I feel this is a safety problem. This switch is designed to shut off the fuel pump during a crash so as not to feed a fire. I googled for "Ford Ranger defective inertia switch," and found thousands of similar complaints where their Ranger would suddenly stop and eventually would require the inertia switch to be replaced and in some instances, it was replaced as many as 3 times during ownership.