Original 1988 Ford/Mercury Dealer Electrical Wiring and Vacuum Diagram Service Manual. This Manual was used by the Factory Dealership to diagnose and identify electrical & vacuum problems on the Thunderbird & Cougar Models. It contains a wealth of information and will prove invaluable in service procedures on this model. It is in good condition with normal wear and soiling from use in a Dealership [see photos]. The front cover is missing but rest of Manual is complete. FPS-12116-88