Need help wiring new lights to my old trailer

Albany NY

Description

Looking for an expert to help me with my new trailer lights. I got all the wire ran, new lights in but i can't get the rear side lights blinkers to both work. only 1 works. Also break lights dont' work. I tried running another wire, same problem. I tried different lights same problem. I double checked all the grounds, grinded the metal for good contact. Also tried a jumper cable to the main ground. no luck. Please text me ! Thank you! :)