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 MANUALSCHEVROLET2025TRAILBLAZER ACTIV, 4WDREPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALWIRING DIAGRAMSCOMPONENT CONNECTOR END VIEWS (M96A-S79LR)COMPONENT CONNECTOR END VIEWSS78 TURN SIGNAL/MULTIFUNCTION SWITCH
2025 Chevrolet Trailblazer ACTIV, 4WD
S78 Turn Signal/Multifunction Switch
2025 Chevrolet Trailblazer ACTIV, 4WDSECTION S78 Turn Signal/Multifunction Switch
Connector Part Information
|
Terminal Part Information
| Terminal Type ID | Terminated Lead | Diagnostic Test Probe | Terminal Removal Tool |
|---|---|---|---|
| I | 19300632 | J-35616-64B (L-BU) | J-38125-215A |
| Pin | Size | Color | Circuit | Function | Terminal Type ID | Option |
|---|---|---|---|---|---|---|
| 1 | 0.5 | WH / GN | 663 | Hazard Switch Left Turn Signal | I | - |
| 2 | 0.5 | VT / BU | 664 | Hazard Switch Right Turn Signal | I | - |
| 3 | 0.5 | BK | 350 | Ground | I | - |
| 4 | 0.5 | WH / GY | 3849 | Automatic High Beam On/Off Switch Signal | I | |
| 5 | - | - | - | Not Occupied | - | - |
| 6 | 0.5 | YE / BN | 307 | Headlamp Switch Flash Signal | I | - |
| 7 | 0.5 | WH | 524 | High Beam Select Switch High Beam Signal | I | - |
| 8 | 0.5 | BK | 350 | Ground | I | |
| 9 - 10 | - | - | - | Not Occupied | - | - |
RENDER: 1.0x
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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.