Hi guys I have 2000 blazer and I'm trying to put a 7way trailer connecter on it and am having problems. All the lights on my truck work but I have no power to my wires from the back all the way to front except my left turn/brake wire. Please help!!

 

check them at the plug with a test llight make sure there hot there if its hot there check the other side of the plug if its hot then check the area where you butted them together and go down the line to see where you lose power