HI, It sounds too me like someone before you had a problem with a bad connection in the fuse box and decided to move the wire from the bad fuse to the other head light fuse. Because now you are running 2 lights you had to use a bigger fuse. The problem with this is the wire is no longer protected for the right current. So when you next headlight blows and the filaments touch together your wire can smoke instead of blowing a fuse. I sugest putting it back the way it was designed then locating the problem. The light is dim because it does not have enough voltage to it. So find the missing voltage and you will find the bad connection. Best way is to use a voltmeter ... Ground the black lead good... Now touch the battery positive.... 12.6 or so... this tell you what 'full' voltage is ... Now check each side of the fuse holder... try to get down to the metal under the fuse .... if yo get 12.3 or 11.8 you have lost some juice.... mostly likey corrorded contacts.... clean them and continue keep working all the way to the light bulb..... If there is a firewall connector check both sides of it.... If you get all the way the the bulb and still have 12.6 volts then move the probe to the ground side ... this should be 0 volts.... if it is more then clean the ground connection bright and shinny... If you don't have a meter you can use a test light and look for it to go dim... when it goes dim it means it has less volts just like your headlight..... 240zforfirstcar's DAD