I will check on volts , and try runing groud to batt. but there will still be only 1 wire to make all functions work , its over my head but it does work [ even if dim] with 1 wire. as for light boxes,thy are custom made,no manufacturers stamp.If any one buildes a car,and dosn't make a bible to go with it I really do not get it.I bought this car at a leake auction about a year ago,no book of any kind ,so every t hing I get into is a nightmare.But I love every min.