Wiring diagram of what component?
A Ford Ranger pickup truck wiring diagram can be obtained from most Ford dealerships. The wiring diagram can also be found at most auto-parts stores.
A wiring diagram for a 1994 Ford Ranger can be found in the Chilton's manual for that vehicle. You can also find this wiring diagram at most auto parts stores.
There is no such thing as a free wiring diagram
spark plugs wiring diagram
wiring diagram for 98 ford ranger door alarm
wiring diagram for GMC 2500?
A diagram of what component?
Most repair manuals have the wiring diagrams in them.
You can get a wiring diagram for a 2000 Buick LeSabre at any auto parts store. A Buick dealership may also be able to give you a wiring diagram for free.
http://www.eautorepair.net
The spark plug wiring diagram for a 2000 F-150 can be found in its service manual. The service manual is available from Ford.