Dash LED Upgrade Doesn't Work - Because?

Hello All,

On my '64 Dart, I just did the RT-Engineering IVR upgrade and wanted to bring the dash lights up to LED brightness. I bought the bulbs and sockets like what has been recommended, (I think by SlantsixDan. I can pull the boxes out of the trash to confirm LED#s.) and the only bulb to burn is the oil pressure light. I tested the bulb in the socket and found them to be polarity sensitive. I switched the sockets around and still no glow. Am I missing something obvious here? :realcrazy: