I ran a 21 circuit painless for my cruiser, it was pretty easy. The most difficult part is the hazard/turn signal situation, but that isn't bad at all. Granted, I like wiring, but anyone could do it pretty easily. The only problem I ran into was some bad wiring on one flasher circuit (from painless), as I was originally going to convert to separate hazard flasher and turn signal flasher like most modern cars, but need up going the Toyota route with only one flasher driving both through the hazard switch.