Hey all, I bought an LED spot/flood light on eBay and it came with no instructions. I sent a message to the seller, but maybe someone here can help out. The wiring is a typical H4 male plug, but when I hook it up with my female H4 plug to bench test, it doesn't work. I tried using a jumper cable to see if it's mount grounded, still nothing. Am I missing something? Operating voltage is 9-40V according to the listing.

 

Swap the positive and negative wires. LEDs only work in one direction.

 

That worked, it's not grounded in the middle like a typical H4 bulb. Thanks for the help

 

Happy to help, definitely post up in your build thread for us to see it!