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 1115 (WIRING SYSTEMS - CONNECTOR END VIEWS)CONNECTOR END VIEWSINLINE HARNESS CONNECTOR END VIEWSC302
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Inline Harness Connector End Views: C302
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION C302
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
C302 Connector End View
| Connector Part Information |
|
Connector Part Information |
|
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|---|---|---|---|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function | Pin | Wire Color | Circuit No. | Function |
| A1 | - | - | Not Used | A1 | - | - | Not Used |
| A2 | BLK | 750 | Ground | A2 | BLK | 750 | Ground |
| A3 | - | - | Not Used | A3 | - | - | Not Used |
| A4 | YEL | 143 | Accessory Voltage | A4 | YEL | 143 | Accessory Voltage |
| A5-A8 | - | - | Not Used | A5-A8 | - | - | Not Used |
| B1 | - | - | Not Used | B1 | - | - | Not Used |
| B2 | DK GRN | 117 | Right Front Speaker Output (-) | B2 | DK GRN | 117 | Right Front Speaker Output (-) |
| B3 | DK GRN | 117 | Right Front Speaker Output (-) | B3 | DK GRN | 117 | Right Front Speaker Output (-) |
| B4 | DK BLU/WHT | 727 | Right Front Door Open Switch Signal | B4 | DK BLU/WHT | 727 | Right Front Door Open Switch Signal |
| B5-B8 | - | - | Not Used | B5-B8 | - | - | Not Used |
| B9 | RED/WHT | 881 | Passenger Mirror Motor Right Control | B9 | RED/WHT | 881 | Passenger Mirror Motor Right Control |
| B10 | GRY | 8 | Instrument Panel Lamp Supply Voltage | B10 | GRY | 8 | Instrument Panel Lamp Supply Voltage |
| B11 | TAN | 294 | Door Lock Actuator Unlock Control | B11 | TAN | 294 | Door Lock Actuator Unlock Control |
| B12 | - | - | Not Used | B12 | - | - | Not Used |
| C1 | LT GRN | 200 | Right Front Speaker Output (+) | C1 | LT GRN | 200 | Right Front Speaker Output (+) |
| C2 | LT GRN | 200 | Right Front Speaker Output (+) | C2 | LT GRN | 200 | Right Front Speaker Output (+) |
| C3 | - | - | Not Used | C3 | - | - | Not Used |
| C4 | ORN | 54 | Passenger Door Jamb Switch Signal | C4 | ORN | 54 | Passenger Door Jamb Switch Signal |
| C5 | LT BLU/BLK | 785 | Passenger Mirror Horizontal Position Sensor Signal (A43) | C5 | LT BLU/WHT | 785 | Passenger Mirror Horizontal Position Sensor Signal (A43) |
| C6 | LT GRN | 675 | Low Reference (A43) | C6 | LT GRN | 675 | Low Reference (A43) |
| C7 | BRN | 787 | Passenger Mirror Vertical Position Sensor Signal (A43) | C7 | BRN | 787 | Passenger Mirror Vertical Position Sensor Signal (A43) |
| C8 | - | - | Not Used | C8 | - | - | Not Used |
| C9 | LT BLU/WHT | 1497 | Passenger Mirror Motor Left/Down Control (w/o A43) | C9 | LT BLU/WHT | 1497 | Passenger Mirror Motor Left/Down Control (w/o A43) |
| GRY | 90 | Passenger Mirror Motor Left Control (A43) | GRY | 90 | Passenger Mirror Motor Left Control (A43) | ||
| C10 | BRN/WHT | 1498 | Passenger Mirror Motor Up Control (w/o A43) | C10 | BRN/WHT | 1498 | Passenger Mirror Motor Up Control (w/o A43) |
| PPL/WHT | 889 | Passenger Mirror Motor Down Control (A43) | PPL/WHT | 889 | Passenger Mirror Motor Down Control (A43) | ||
| C11 | GRY | 295 | Door Lock Actuator Lock Control | C11 | GRY | 295 | Door Lock Actuator Lock Control |
| C12 | YEL | 674 | 5-Volt Reference (A43) | C12 | YEL | 674 | 5-Volt Reference (A43) |
| D1 | ORN | 267 | Heated Mirror Element Supply Voltage (DE5) | D1 | ORN | 267 | Heated Mirror Element Supply Voltage (DE5) |
| D2 | - | - | Not Used | D2 | - | - | Not Used |
| D3 | RED/BLK | 780 | Driver Door Lock Switch Lock Signal | D3 | RED/BLK | 780 | Driver Door Lock Switch Lock Signal |
| RED/BLK | 780 | Driver Door Lock Switch Lock Signal | |||||
| D4 | PPL | 1124 | Door Lock Key Switch Unlock Signal | D4 | - | - | Not Used |
| PPL | 1124 | Door Lock Key Switch Unlock Signal | |||||
| D5 | LT BLU | 166 | Power Window Master Switch Right Front Up Signal | D5 | LT BLU | 166 | Power Window Master Switch Right Front Up Signal |
| D6 | TAN | 167 | Power Window Master Switch Right Front Down Signal | D6 | TAN | 167 | Power Window Master Switch Right Front Down Signal |
| D7-D8 | - | - | Not Used | D7-D8 | - | - | Not Used |
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.