Re-check the front signal. Make sure the bulb isn't burnt, both filaments good. Clean the socket with some wd40 and toothbrush to get any gunk out of it to ensure you have a good connection.
I had every problem imaginable with my lighting, including the no signals when lights are on, and most problems were fixed by simply cleaning all of the connections. I did have to replace my relay, too, so if you cleaned everything, made sure you have the correct bulbs and installed properly, swap the relay.
