hello, new to this site, i have a problem with the headlights in a 1972 b110, when you turn on the headlights the fusebox heats up and starts to melt so they can not be used for very long.., about 20 years ago my dad tried fixing it but couldn't figure it out and stopped driving it. i would like to drive it and working headlights would be needed

i hope this is the right place for this

thanks