Like princeaz says, you need a relay and wiring harness too. The best place to get your pre made and custom wiring harnesses with built in relays is from Jim Davis at www.easternbeaver.com. Jim is "The Man" when it comes to this stuff. If you have any questions about his products, shoot him an email and he will reply back very quickly.

 

http://www.powerletproducts.com/shop-by-vehicle/1/254/product/harley-mid-kits-1991-present/332

I am really pleased with this accessory. Many options available. Right now I run my battery tender and heated gear with it.

 

I like this. I thought I was the only one