be careful what you tap into. i bought the same gauges a couple weeks ago. i tapped into my parking lights and they worked great for about 10 minutes. then the gauges blew out. i don't know what the deal was. it wasn't the fuse. i even tried wiring a new in line fuse to it and tried any wire that tested hot with the lights on. they are toast. i just ordered the other kind that don't have the wires. my ground was good too, so i think something went wrong with the gauges. let me know if you are successful. btw, they look pretty sweet when they are working. good luck.