I got a couple LED headlights and when i went to install them, the passenger side didnt work for some reason, i even put in the previous halogen i used, and it wont even light up now, i drove home in the dark just before install and used the headlights on the way home, so i know they worked beforehand, I was thinking it might be a bad plug since the other one works just fine, but took a light tester to it, grounded it, and it seemed i got power at every wire before the plug and every prong of the headlight when i plugged it in, any clue what might be wrong and how to fix it?

 

two things come to mind

1) a bad wire, enough to show 12V, but wont allow enough current to light headlight

2) check both headlights with wires straight from battery to make sure they work

 

Ended up figuring it out, seems the plug was bad, despite the prongs still showing power to them, just cut it off and soldered a new one on, worked great, appreciate the reply