Buy a Chilton or Haynes repair manual
www.files.3weelerworld.com/Wiring/KLT200WiringDiagram1.jpg that is a complete wiring diagram.
A diagram of the wiring systems in a car can be used as a guide. A wiring diagram for the 1983 Ford can be found in its maintenance manual.
A complete wiring diagram from bumper two bumper
Join Zcar.com they have wiring diagrams. Also order Haynes manual about 15 dollars. it has a complete wiring diagram in the back.
Wiring Diagrams Ford Crown Victoria/Grand Marquis 1989-1998 from AutoZone DIY http://www.autozone.com/az/cds/en_us/0900823d/80/17/3d/a8/0900823d80173da8/repairInfoPages.htm
the only wiring diagram i have found on line for free so far is at autozone.com
Chiltons has a repair manual that gives a very complete wiring diagram for several motors and body styles.
The Nissan shop manual has a complete wiring diagram, they can be found on e-bay.
When working on the wiring systems of any vehicle is important to have a diagram. A free diagram can be obtained via a print out from an auto part store.
It is important to have diagrams of all the systems in a car. A 2000 Ford Courier wiring diagram can be found in the cars maintenance manual.
A complete diagram is available at MOTORLIT.COM.
www.fordification.com