Many thanks for all the responses.
Thanks to everyone for the hints and tricks. I have checked the truck fuses and 7 pin connection truck side, and cleaned all the plug contacts and am getting brake and signal lights, but still no running lights when plugged into the running truck with the lights on. Am I still missing anything? I should mention that I do not have the trailer battery hooked up at this time as the trailer is still in storage. Could this be the source of my trouble? Sorry if these seem like newb questions, we are fairly new to RV ing. As always, any thoughts are appreciated.