This is the original wiring diagram printed by Ford for dealer mechanics. You can follow the wiring in your truck from bumper-to-bumper. It will help you to understand connector configurations, and locate & identify circuits, relays, and grounds. Although the schematic is in black and white, the color of each wire is noted. You will not find this diagram in your shop manual. The schematic measures 11" x 17" when folded up, and opens up to 11" by 27". Diagrams may be folded in half for shipping. The diagram pictured is an example of this type when unfolded, but is not the actual diagram for your vehicle. Buy now for the best electrical repair info--the factory wiring diagram.
This diagram is complete as printed by Ford, and is the only diagram made by Ford for these vehicles. Pages are numbered 1 of 4 through 4 of 4. The index indicates additional information on pages 5 and beyond. Ford made a mistake and did not print these additional pages, nor have we been able locate additions or corrections to the diagram. The diagram includes engine compartment and alternator, ignition coils, fuel system, vacuum pumps, some relays but not all, emissions and fuel solenoids. It does not include A/C and heater, axle control, lighting, horn, wipers, and many switches. If you need information missing from this diagram, we recommend that you purchase a 1986 or 1988 diagram in addition to this one.