So i got this problem :P I have a 2007 wiring loom in my classic and in the 2007 car they have different bulbs for the hi and low beams. but my headlights use the same bulb H4 , when I put on the hi beam the low beams stay on and the bulbs can overheat and die , anyone know what I could do, replace a relay or something to make it work right?

 

You could add a relay which disconnects the dip beam when the main beam is switched on. Might need one on each side.

I don't know, but does having both filaments on at the same time cause an overheating problem? At least it would improve the lighting.