Circuit Functions
All circuits in the diagrams use an alpha/numeric code to identify the wire and its function. To identify which circuit code applies to a system, refer to the Circuit Identification Code Chart. This chart shows the main circuits only and does not show the secondary codes that may apply to some models.
CIRCUIT IDENTIFICATION CODE CHART
| CIRCUIT | FUNCTION |
|---|---|
| A | BATTERY FEED |
| B | BRAKE CONTROLS |
| C | CLIMATE CONTROLS |
| D | DIAGNOSTIC CIRCUITS |
| E | DIMMING ILLUMINATION CIRCUITS |
| F | FUSED CIRCUITS |
| G | MONITORING CIRCUITS (GAUGES) |
| H | MULTIPLE |
| I | NOT USED |
| J | OPEN |
| K | POWERTRAIN CONTROL MODULE |
| L | EXTERIOR LIGHTING |
| M | INTERIOR LIGHTING |
| N | MULTIPLE |
| O | NOT USED |
| P | POWER OPTION (BATTERY FEED) |
| Q | POWER OPTIONS (IGNITION FEED) |
| R | PASSIVE RESTRAINT |
| S | SUSPENSION/STEERING |
| T | TRANSMISSION/TRANSAXLE/ TRANSFER CASE |
| U | OPEN |
| V | SPEED CONTROL, WIPER/WASHER |
| W | WIPERS |
| X | AUDIO SYSTEMS |
| Y | TEMPORARY |
| Z | GROUNDS |