Diagram Information and Instructions
AbbreviationsA/C Air Conditioning
CKT Circuit
CONN Connector
EBCM Electronic Brake Control Module
EBTCM Electronic Brake and Traction Control Module
ECM Engine Control Module
HARN Harness
I/P Instrument Panel
IPC Instrument Panel Cluster
LH Left Hand
PCM Powertrain Control Module
RH Right Hand
TERM Terminal
Power Distribution
The Power Distribution schematic shows the wiring from the Battery and Generator to the Starter Solenoid, Fuse Block, ignition Switch and Light Switch. The first component after a Fusible Link is also shown. In certain instances, the first component after a Fuse Block fuse and Light Switch is also shown.
The Power Distribution schematic refers to Fuse Block Details or the appropriate section schematics. By using these schematics, power distribution wiring can be followed from the Battery and Generator to the first component after a Fusible Link, Fuse or Light Switch. The ability to follow the power distribution wiring to the first component in each circuit is extremely helpful in locating short circuits which cause fusible links and fuses to open.
A sample Power Distribution schematic. it shows how voltage is applied from the positive battery terminal to the various circuits on the vehicle. For example, battery voltage is applied to the Starter Solenoid, Fusible Link D, Fuses 1 and 2 in the Fuse Block and the Light Switch in the LH Pod. These fuses are said to be "Hot At All Times", since battery voltage is always applied to them.
Notice that battery voltage is also applied to "Fusible Link F" and "Coolant Fan Relay."
Fuse Block Details
The Fuse Block Details schematic shows all of the wiring between a fuse and the components connected to the fuse. The Fuse Block Details schematic is extremely helpful in locating a short circuit that causes a fuse to open.
Ground Distribution
a sample Ground Distribution schematic for the Headlamps. It shows exactly which components share each ground. This information can often be a time saver when troubleshooting ground circuits.
For example, if both Headlamps and the Park/Turn Lamp on one side are out, suspect an open in their common ground wire or the ground connection itself. On the other hand, if one of the lamps work, the ground and the wire up to the splice are good. You have learned this just by inspecting the schematic and knowing the vehicle's symptoms. No actual work on the lighting system was needed.