Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCADILLAC2011CTS V, 2D COUPE, STANDARDREPAIR AND DIAGNOSISELECTRICALWIRING DIAGRAMSWIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - A/C COMPRESSOR CLUTCH THROUGH BODY CONTROL MODULECOMPONENT CONNECTOR END VIEWSBODY CONTROL MODULE (BCM) X3 CONNECTOR END VIEW
2011 Cadillac CTS V, 2D Coupe, Standard
Body Control Module (BCM) X3 Connector End View
2011 Cadillac CTS V, 2D Coupe, StandardSECTION Body Control Module (BCM) X3 Connector End View
Body Control Module (BCM) X3
| Pin | Wire | Circuit | Function |
|---|---|---|---|
| 1 | 0.8 BK/WH | 651 | Ground |
| 2 | 0.8 RD/WH | 1240 | Battery Positive Voltage |
| 3 | 0.8 RD/WH | 1140 | Battery Positive Voltage |
| 4 | - | - | Not Used |
| 5 | 0.8 BK/WH | 651 | Ground |
| 6 | - | - | Not Used |
| 7 | 0.35 GY | 728 | Security Indicator Control (UA2) |
| 8 | 0.5 TN/BK | 2500 | High Speed GMLAN Serial Data Bus+ |
| 9 | 0.5 TN | 2501 | High Speed GMLAN Serial Data Bus- |
| 10 | 0.35 D-GN | 5060 | Low Speed GMLAN Serial Data |
| 11 | 0.35 D-GN | 44 | I/P Lamps Dimmer Switch Signal |
| 12 | 0.35 OG/WH | 812 | 12-Volt Reference or I/P Dimming Voltage Reference |
| 13 | 0.35 L-GN | 526 | Stop Lamp Switch Signal |
| 14 | 0.35 TN | 552 | Low Reference |
| 15 | 0.35 GY | 598 | 5-Volt Reference 1 |
| 16 | 0.5 TN/BK | 2500 | High Speed GMLAN Serial Data Bus+ |
| 17 | 0.5 TN | 2501 | High Speed GMLAN Serial Data Bus- |
| 18 | 0.35 YE | 6817 | LED Backlight Dimming Control |
| 19 | 0.35 L-BU | 5986 | Serial Data Communication Enable |
| 20-21 | - | - | Not Used |
| 22 | 0.35 D-GN/WH | 7158 | Cruise Control Indicator Dimming Signal |
| 23-24 | - | - | Not Used |
| 25 | 0.35 WH | 901 | IC 2 Control (TSQ) |
Connector Part Information
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Terminal Part Information
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RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.