I just bought the reverse glow gauges and spent 4 hours trying to get them to work. After all that time, it still doesn't work. One of the wires may have come loose, but if anybody has had any similar problems or any advice I would appreciate it.

 

Thank you everyone for your input. The problem was a bad switch. I bypassed it and the gauges lit up. They are really cool. If anybody is thinking about getting them, it's definitely worth it.