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 MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1780 (ANTILOCK BRAKE SYSTEM AND TCS)COMPONENT LOCATORANTILOCK BRAKE SYSTEM CONNECTOR END VIEWSELECTRONIC BRAKE CONTROL MODULE (EBCM)
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Electronic Brake Control Module (EBCM)
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Electronic Brake Control Module (EBCM)
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Electronic Brake Control Module (EBCM) Connector Parts Information
Connector Part Information
|
Electronic Brake Control Module (EBCM) Connector Terminal Identification
| Pin | Wire Color | Circuit Number | Function |
|---|---|---|---|
| 1 | BN | 882 | RR WSS Signal |
| 2 | - | - | Not Used |
| 3 | WH | 883 | RR WSS Low Reference |
| 4 | D-GN | 872 | RF WSS Signal |
| 5 | TN | 833 | RF WSS Low Reference |
| 6 | YE | 873 | LF WSS Low Reference |
| 7 | L-BU | 830 | LF WSS Signal |
| 8 | BK | 884 | LR WSS Signal |
| 9 | RD | 885 | LR WSS Low Reference |
| 10 | - | - | Not Used |
| 11 | WH/BK | 5043 | Keyword Serial Data (Except LAT) |
| 12-14 | - | - | Not Used |
| 15 | PK | 1039 | Ignition 1 Voltage |
| 16 | BK | 350 | Ground |
| 17 | RD | 702 | Battery Positive Voltage |
| 18 | OG | 140 | Battery Positive Voltage |
| 19 | BK | 350 | Ground |
| 20-24 | - | - | Not Used |
| 25 | TN | 2501 | CAN Low |
| 26 | - | - | Not Used |
| 27 | TN/WH | 2500 | CAN High |
| 28 | - | - | Not Used |
| 29 | TN | 2501 | CAN Low |
| 30 | TN/WH | 2500 | CAN High |
| 31 | BN/WH | 1571 | Traction Control Switch Signal (NW9) (Except LAT) |
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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.