Hello, my 1979 urban express is running great for me except one thing. The headlight only works on high beam, the blinkers go on but don't blink 90% of the time, and when they do blink, the right side is much stronger then the left. I changed the battery thinking it was just low on juice but it hasn't helped. I checked all the wires and they look fine. Is it just the bulbs that need replacing or is there something more that I'm missing? Thanks for the help.