Circuit Functions
WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
All circuits in the wiring 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 table below .
NOTE:
This table shows the main circuits only and does not show the secondary codes that may apply to some models.
CIRCUIT IDENTIFICATION CODE TABLE
| CIRCUIT CODE | 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 |