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.
Relay Block - I/P C1
2008 Pontiac Grand Prix BaseSECTION Relay Block - I/P C1
WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
Relay Block - I/P C1 Connector Parts Information
Connector Part Information
|
Relay Block - I/P C1 Connector Terminal Identification
| Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
| A1 | L-GN | 24 | Backup Lamp Supply Voltage |
| L-GN | 24 | Backup Lamp Supply Voltage | |
| A2 | - | - | Not Used |
| A3 | BK/WH | 1704 | Low Reference |
| A4 | D-GN/WH | 636 | Ambient Air Temperature Sensor Signal |
| A5 | BK/WH | 1851 | Ground |
| BK/WH | 1851 | Ground | |
| A6 | WH | 193 | Rear Defog Relay Control |
| A7 | - | - | Not Used |
| A8 | BN/WH | 230 | Instrument Panel Lamps Dimming Control |
| A9 | BN | 341 | Ignition 3 Voltage |
| A10 | D-GN/WH | 817 | Vehicle Speed Signal |
| A11 | BN/WH | 230 | Instrument Panel Lamps Dimming Control |
| BN/WH | 230 | Instrument Panel Lamps Dimming Control | |
| A12 | GY/BK | 690 | Courtesy Lamp Supply Voltage |
| B1-B2 | - | - | Not Used |
| B3 | BK/WH | 1851 | Ground |
| BK/WH | 1851 | Ground (U2K) | |
| B4 | - | - | Not Used |
| B5 | BK/WH | 1851 | Ground (Except UE4) |
| B6 | OG | 1840 | Battery Positive Voltage |
| B7 | RD | 642 | Battery Positive Voltage |
| B8 | BN/WH | 230 | Instrument Panel Lamps Dimming Control |
| B9 | D-GN/WH | 817 | Vehicle Speed Signal |
| B10-B12 | - | - | Not Used |
| C1 | - | - | Not Used |
| C2 | BN/WH | 230 | Instrument Panel Lamps Dimming Control |
| BN/WH | 230 | Instrument Panel Lamps Dimming Control | |
| C3 | BN/WH | 230 | Instrument Panel Lamps Dimming Control |
| C4 | OG | 1732 | Inadvertent Power Supply Voltage |
| OG | 1732 | Inadvertent Power Supply Voltage | |
| C5 | BK/WH | 1851 | Ground |
| BK/WH | 1851 | Ground | |
| C8 | BN/WH | 230 | Instrument Panel Lamps Dimming Control |
| BN/WH | 230 | Instrument Panel Lamps Dimming Control | |
| C9 | OG | 1340 | Battery Positive Voltage |
| C10 | BN | 2409 | Interior Park Lamps Supply Voltage |
| C11-C12 | - | - | Not Used |
| D1 | WH/BK | 5515 | Inside Air Temperature Sensor Assembly Control |
| D2 | BN/WH | 230 | Instrument Panel Lamps Dimming Control |
| D3 | BN/WH | 230 | Instrument Panel Lamps Dimming Control |
| D4 | OG | 1732 | Inadvertent Power Supply Voltage |
| D5 | BK/WH | 1851 | Ground |
| BK/WH | 1851 | Ground (Except UE4) | |
| D8 | BK/WH | 1851 | Ground |
| D9 | BK | 1050 | Ground |
| D10 | BN | 2409 | Interior Park Lamps Supply Voltage |
| D11-D12 | - | - | Not Used |
| E1 | BN | 718 | Low Reference |
| E2 | PK | 1691 | Automatic Day/Night Mirror Low Reference |
| E3 | - | - | Not Used |
| E4 | PU/WH | 1382 | LED Dimming Supply |
| PU/WH | 1382 | LED Dimming Supply | |
| E5 | BK/WH | 1851 | Ground |
| BK/WH | 1851 | Ground | |
| E6 | D-GN/WH | 817 | Vehicle Speed Signal |
| E7 | PU/WH | 1382 | LED Dimming Supply |
| E8 | BK/WH | 1851 | Ground |
| BK/WH | 1851 | Ground | |
| E9 | - | - | Not Used |
| E10 | RD | 242 | Battery Positive Voltage |
| E11-E12 | - | - | Not Used |
| F1 | D-GN | 734 | Inside Air Temperature Sensor Signal |
| F2 | GY | 1690 | Automatic Day/Night Mirror Signal |
| F3 | PK | 739 | Ignition 1 Voltage |
| F4 | - | - | Not Used |
| F5 | BK/WH | 1851 | Ground |
| F6 | PU/WH | 1382 | LED Dimming Supply |
| PU/WH | 1382 | LED Dimming Supply | |
| F7 | OG | 4540 | Battery Positive Voltage |
| F8 | BK/WH | 1851 | Ground |
| F9 | L-BU | 1620 | CHMSL Supply Voltage |
| F10 | D-BU | 47 | Trailer Auxiliary Supply Voltage |
| F11 | YE | 243 | Accessory Voltage |
| 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.