"BIG FISH 2006" wrote in message
...
did the box have a fuse in it ? where would I find one.

He is probably talking about a plug in relay adaptor box. Just follow your
trailer pigtail wire back to up under the truck. I do not think bigger GM
or Chevy trucks need or have one. Some of the smaller trucks have a plug in
adaptor, but they did not need a relay box.