Electrical question

[RFerguson]

I have no running lights when I plug in my 5th wheel or utility trailer. The wiring on both appears to be fine. Running lights used to work so I suspect a broken wire or something on the truck. When it comes to schematics I am definately challenged. Does anyone have any suggestions or ideas? Thanks.

 

[Matt400]

I would check for a blown fuse for that circuit under the hood.

 

[BimmerAgent]

RFERG-I once had trailer light issues, and it boiled down to a simple blown fuse in the underhood fuse block..... number 47, I think. Bruce