This item works on PCM controlled alternators from 2003 and up cars/trucks. Adjustable from 14v to 15.6v depending on your regulator, this product has been tested on OEM ford regulators, which is all we use in our units!
Email us if you are unsure if your vehicle is PCM controlled, most Ford Diesels are NOT pcm controlled so double check with us if you are unsure, because there are no refunds for this product.