I have a 91 Harley Softail Custom....me and my buddy changed the rear tail light and rear turn signal bulbs, and doing so we had to sodder some wire together for the Right turn signal. Well my Left turn signal went out a few weeks later. Then my bro noticed my tail light wasn't working the other day....and on my way home from his place I was haulin' a$$ down the highway and when I hit my brights it killed my headlight completely..scaring the shit outta me, When i turned my brights off..my headlight comes back on...And when I slow down my headlight dims. But my turn signals in front stay bright and work great. Don't think its the battery.....wats up?