Halo light not working

which model lights, got a pic? Its probably the led for the halos went bad it has a diode that can go sometimes. you can find replacement leds for halos for sale online but they are gonna run ya 20-30 bucks each, i had one go bad and bought 2. I might sell ya mine and give ya a deal if u r interested its pretty simple to swap out.
 
halo

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Take a look at the back of your light and see if theres a spot where this light plugs into so u can pull it out and swap, it the light is sealed then u are screwed and would have to replace the whole thing.
 
No problem, yeah it sucked when i only had one working too so i know how u feel. Depends on the type of connector if it is a crimp you probably can't reuse it you could buy a new connector or splice the new halo led in. I'm going to take a pic of the spare led i have and post it and shoot you and email if u wanna buy it. I might have some connectors too i will look.