I'm having a weird issue with my license plate lights. I looked up the number for the bulb (C-5W) in the manual. Couldn't find that in the store so got a same size 5W festoon base bulb (Sylvania 6418). According to AutoZone they are the correct cross-reference for the C-5W. My holders were corroded so I took them loose and cleaned em up. Checked the bulbs and read 3.5 ohms. In the holders, 3.6 ohms. BULBS AND HOLDERS GOOD The terminals on the car are reading 9.5V with engine off and 11.8V with it on. PROPER VOLTAGE Plugged the holder back up and get no light. Take bulbs out and read 11.8 at terminals of both holders. Can't figure out why lights aren't working. Anyone??