Dan - I have tried three roller assemblies and each one has a short. Two of the assemblies don't have wires. So, it would seem that the source of the short would either be the screws coming in contact with the metal base of he roller assembly or the alignment tabs at the base of roller assembly coming into contact with the truck frame. I applied some electrical tape to the holes in the truck frame that accept the alignment pins, so most likely the source of the short is one or both screws. I will order the shoulder insulating washer and hopefully that will fix the problem.
And, the short goes away when I remove the roller assembly. I will let you know when I receive and install the shoulder washers.
Thanks for your help. Tom
