egarant wrote:
Hey Portscanner,
That sounds like a great idea! I would be most appreciative if you can forward that info to me.
Thanks!!
I got one of
these.

The umbilical cable on my camper comes in right next to the fuse panel. I disconnected the 12V wire that comes from the umbilical from the fuse and connected it to one the top (large) terminals. The second top terminal is connected to the fuse where the 12V wire was originally connected.
The wire from the umbilical that feeds the running lights is connected to a fuse. I ran a wire from the far side of the fuse (not the side the umbilical is connected to) to one of the small terminals near the bottom of the relay. In the (doubtful) event the coil shorts out, the fuse will blow, protecting the truck. Then take the other terminal on the relay to the - side of the 12 volt system.