I just picked up a 1970 CL450 and it's having an issue with the taillight that I'm trying to figure out.. The taillight comes on when the key is in the park position and when the bike is running without the headlight on, but anytime I turn the headlight on, the taillight turns off. Also, the brake light comes on with the handbrake but not the foot brake. The bulb is good considering I just replaced it and both the running light and brake lights come on, just not all the time. Any ideas on why turning the headlight on might switch the taillight off? Thanks!