aftermarket lights

Hey guys, I just changed out all my light bulbs in my FJ80 (91') and I want to make sure they are all in the correct polarity before I close it all up. Is there a way to test all lights to make sure they all light after changeout? This is my 2nd time taking it out because some of them didn't...

Buy & Sell Locally - OfferUp - Buy. Sell. Simple. - https://offerup.com/item/1770617256/discussions OPEN TO OFFERS AND SHIPPING. i UPGRADED MY BUMPER TO AN ARB AND THESE WILL NO LONGER WORK, OUT OF THE BOX, BUT UNUSED.

Price - $50 OBO (includes QTY 2) Selling QTY 2 8" round LED lights. See my profile picture for how they look installed. These are as bright as the sun. I bought them in 2018 for $99 each and took them off before I sold my truck a few years ago. They're still in good condition and have been...