How to Read and Use the Circuit Schematics
OVERVIEWCircuit Schematics:
Each schematic represents one circuit. A circuit's wires and components are arranged to show current flow, from power at the top of the image, to ground, at the bottom.
Other circuits may share power or ground terminals or wiring with the circuit shown. A wire that connects one circuit to another, for example, is cut short and has an arrowhead at the end of it pointing in the direction of current flow. Next to the arrowhead is the name of the circuit or component which shares that wiring. To quickly check shared wiring, check the operation of a component it serves. If that component works, you know the shared wiring is OK.
All connectors are numbered (C709, C416, etc.). Below each connector number (except those for components) is the number of a photo showing the connector's location on the car. Connector cavities are also numbered. The numbering sequence begins at the top left corner of the connector as seen. Disregard any numbers molded into the connector housing.
Wires are identified by the abbreviated names of their colors; the second color is the color of the stripe. Wires are also identified by their location in a connector. The number "2" next to the male and female wire terminals at C416, for example, means those terminals join in cavity 2 of connector C416.
Refer to "Wire Color Abbreviations".
POWER DISTRIBUTION SCHEMATICS
Power Distribution schematics show how power is supplied from the positive battery terminal to various circuits in the car. Refer to the power distribution diagrams to get a more detailed picture of how power is supplied to the circuit you're working on.
From Battery to Ignition Switch, Fuses, and Relays
Power Distribution Schematics-From Battery To Ignition Switch, Fuses,and Relays:
Individual circuit schematics begin with a fuse. The first half of power distribution, however, shows the wiring "upstream" between the battery and the fuses.
From Fuses to Relays and Components
The second half of power distribution shows the wiring "From Fuses to Relays and Components." This can speed your troubleshooting by showing which circuits share fuses. If power distribution shows that an inoperative circuit and another circuit share a fuse, check a component in the other circuit. If it works, you know the fuse is good and power is available to the inoperative circuit.
GROUND DISTRIBUTION SCHEMATICS
Ground Distribution Schematics:
This sample Ground Distribution schematic shows all of the components that share two ground points.
COMPONENT LOCATIONS
To see where a component or connector is located on the car, look up its photo number in the Component Location section. The photo will also tell you the color of the connector, and how many cavities it has.
Component Location:
If there is no photo number below or beside a connector, ground, or terminal number, look up that connector, ground, or terminal number in the appropriate Connector Identification Chart. The chart will tell you the color of a connector, how many cavities it has, where it's located, and what component or harness it connects to. Along with this chart you'll find an image giving illustration of the related harness.