1996 Dodge Caravan license plate light

When I bought my used caravan it had a neon license plate that worked, I bought the whole light casing and had the neon removed and the new license plate light installed everything worked fine for a few weeks then I noticed the license plate light wasn't working. Everything else on my vehicle works great with the exception of my cruise control never worked when I bought it. I don't have the fuse diagram to know which fuse may work the license plate light and I always thought that if it were the fuse it would be more then just one little issue like the license plate light for one fuse. Can you please help!