I think the truck is like a 1930's Chevy, so it has the large headlight buckets. I tried the power inverter and that didn't work. I think they must have made it so it can only receive power in from the two terminals and supply it to the two outlets. But you can't supply power to an outlet and have it supply power to the terminals that i would be tieing to the headlights. My next attempt will be to get one of those outdoor light power units and see if that will work. If that doesn't do the job, i'll probably just buy a 6 volt battery and power it direct from the battery and just charge it up time to time. I won't have the thing powered up unless i have the guys over to the garage for a beverage or two. LOL
