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 1774 (COMPONENT LOCATIONS AND CONNECTOR END VIEWS)ELECTRICAL CENTER IDENTIFICATION VIEWSFUSE BLOCK - UNDERHOOD C1
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Fuse Block - Underhood C1
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Fuse Block - Underhood C1
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.
Fuse Block - Underhood C1 Connector Parts Information
Connector Part Information
|
Fuse Block - Underhood C1 Connector Terminal Identification
| Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
| A1 | - | - | Not Used |
| A2 | L-BU | 409 | Cooling Fan Motor Supply Voltage |
| A3 | - | - | Not Used |
| A4 | PK | 1200 | Headlamp High Beam Signal |
| A5 | L-BU | 14 | Left Turn Signal Lamps Supply Voltage (L66) |
| - | - | Not Used (L61) | |
| A6 | BK | 150 | Ground |
| A7 | - | - | Not Used |
| A8 | RD | 228 | Windshield Washer Pump Control |
| A9 | BN | 9 | Park Lamp Supply Voltage |
| A10 | - | - | Not Used (L66) |
| A10 | GY | 532 | Cooling Fan Motor Supply Voltage (L61) |
| A11 | GY | 532 | Cooling Fan Motor Supply Voltage (L66) |
| - | - | Not Used (L61) | |
| A12 | - | - | Not Used |
| B1-B2 | - | - | Not Used |
| B3 | D-GN | 29 | Horn Control |
| B4 | PK | 1200 | Headlamp High Beam Signal |
| B5 | OG | 740 | Battery Positive Voltage |
| B6 | D-BU | 15 | Right Turn Signal Lamps Supply Voltage |
| B7-B8 | - | - | Not Used |
| B9 | BN | 9 | Park Lamp Supply Voltage |
| B10 | - | - | Not Used |
| B11 | GY | 532 | Cooling Fan Motor Supply Voltage (L66) |
| - | - | Not Used (L61) | |
| B12 | - | - | Not Used |
| C1 | D-GN | 392 | Rear Window Washer Switch Signal |
| C2 | - | - | Not Used (L66) |
| L-BU | 409 | Cooling Fan Motor Supply Voltage (L61) | |
| C3 | - | - | Not Used (L66) |
| L-BU | 14 | Left Turn Signal Lamps Supply Voltage (L61) | |
| C4 | D-BU | 1201 | Headlamp Low Beam Signal (L66) |
| - | - | Not Used (L61) | |
| C5 | OG | 740 | Battery Positive Voltage |
| C8 | - | - | Not Used |
| C9 | BN | 9 | Park Lamp Supply Voltage |
| C10 | OG | 3040 | Battery Positive Voltage (L66) |
| - | - | Not Used (L61) | |
| C11-C12 | - | - | Not Used |
| D1-D2 | - | - | Not Used |
| D3 | D-BU | 1201 | Headlamp Low Beam Signal |
| D4-D5 | - | - | Not Used |
| D8-D12 | - | - | Not Used |
| E1 | - | - | Not Used |
| E2 | PU | 34 | Fog Lamps Supply Voltage (T96) |
| E3 | - | - | Not Used (L66) |
| D-BU | 1201 | Headlamp Low Beam Signal (L61) | |
| E4-E7 | - | - | Not Used |
| E8 | OG | 640 | Battery Positive Voltage |
| E9-E12 | - | - | Not Used |
| F1 | - | - | Not Used |
| F2 | PU | 34 | Fog Lamps Supply Voltage (T96) |
| F3 | - | - | Not Used |
| F4 | GY | 589 | DRL Resistor Supply Voltage |
| F5-F8 | - | - | Not Used |
| F9 | OG | 640 | Battery Positive Voltage |
| F10-F12 | - | - | 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.