2008 Highlander Relay?

[KJoeZ61@rcn.com]

My Highlander came with the towing package, but I guess something is missing. I purchased the wiring harness that goes from the cargo box area and installed the fuse, but no lights. Is there a relay or something? Any help would be appreciated...
Thank's
Joe

[funfinder4]

Do you have a volt meter or test light? You need to test the trucks end first and see if you have voltage at the plug. Most trailer light issues are on the trailer's end and/or incorrect trailer grounds.