alright, I've tried searching with no luck. I regularly tow a 24' box trailer with interior cargo lights. They are functional but do not work with my expedition, a 2004 XLT with a towing package. I know this has to do with the 12v power line and I've read some things about some relays and fuses which are not installed. Does anyone know which relays/fuses need to be installed and where? I've did a quick scan on the interior fuse panel and looked for the under hood box quickly but didn't see it. Where is it located and am I on the right path??