Both Wiring4Cars.com and FreeAutoMechanic.com offer full wiring diagrams for a variety of vehicles free of charge. These diagrams are available from both websites in PDF format.
Vehicle wiring diagrams are essential for users who are working to repair their own vehicles. Wiring4Cars.com offers a large portion of their downloadable diagrams in full color, making it easy to trace the layout of wires when working on a vehicle. FreeAutoMechanic.com offers a free diagram request service, where users can request diagrams for vehicles that have not yet been made available in their downloadable database. Both websites have some overlap on the diagrams offered, so both should be consulted when looking for a particular vehicle diagram, as one may have it available if the other does not.