wiring LED's to motorcycle. need help!?
wired 3 led's in a series and tested them on the 12V battery. everything looked good. i undid and redid the leads to the battery and everything was good. as it was sitting there and i was walking around the bike the leds went out. i cut each wire between the leds to check each individual one. they're all 3 dead. there's not way any wires could have crossed or touched because the connections (other than the battery leads) were sealed and waterproofed.
why did this happen?
feel free to correct me because i'm a complete noob with this but i believe it was the amperage. i'm not running any resistors. and resistors control amperage i believe? i am planning on running a fuse in the line but this has nothing to do with controlling the amperage.
the 12V battery was showing a constant 11.6V on my meter. so this means each led was running at about 3.9V per led. is this correct?
(these are 3mm leds i believe) the brightness was perfect as they were before they blew.
my question is what did i do wrong? and how do i keep them from blowing. i need this to be reliable because after i install them it will be permanent and i can't undo them to rewire anything.
if you suggest using resistors please explain details including where in the line to wire them, as i know nothing about resistors. also i would like to keep the same brightness i had.