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 MANUALSPONTIAC2004GTO STANDARDREPAIR AND DIAGNOSISELECTRICALWIRING DIAGRAMSWIRING SYSTEMSCOMPONENT LOCATORPOWER AND GROUNDING COMPONENT VIEWS
2004 Pontiac GTO Standard
Power and Grounding Component Views
2004 Pontiac GTO StandardSECTION Power and Grounding Component Views
| Callout | Component Name |
|---|---|
| 1 | Windshield Wiper Motor Connector |
| 2 | Brake Pressure Differential Connector |
| 3 | Electronic Brake Control Module Connector |
| 4 | Cruise Control Module Connector |
| 5 | Main Wiring Harness to Battery Wiring Harness Connector |
| 6 | Underhood Fuse Block Connector |
| 7 | Front Wheel Speed Sensor Connector |
| 8 | ABS Bracket Connector |
| 9 | Ground Connector |
| 10 | Fusible Link Supply Connector |
| 11 | Turn Signal Lamp Connector |
| 12 | Headlamp Connector |
| 13 | Windshield Wiper and Windshield Washer Connector |
| 14 | Front Fog Lamp Connector |
| 15 | Horn Connector |
| 16 | Ambient Air Temperature Sensor Connector |
| 17 | Theft Deterrent Connector |
| 18 | Engine Cooling Fan Connector |
| 19 | Engine Main Wiring Harness to Powertrain Wiring Harness Connector |
| 20 | Horn Connector |
| 21 | Front Fog Lamp Connector |
| 22 | Headlamp Connector |
| 23 | Turn Signal Lamp Connector |
| 24 | Front Wheel Speed Sensor Connector |
| Callout | Component Name |
|---|---|
| 1 | Horn Connector |
| 2 | Theft Deterrent Connector |
| 3 | Throttle Actuator Connector |
| 4 | Coolant Overflow Bottle Bracket |
| 5 | Engine Coolant Level Switch Connector |
| 6 | Powertrain Control Module (PCM) |
| 7 | Engine Harness |
| Callout | Component Name |
|---|---|
| 1 | Main Wiring Harness to Powertrain Harness Connector |
| 2 | Radio Front Upper Dash Speaker Connector |
| 3 | Automatic Headlamp Control Switch Connector |
| 4 | Sunroof Control Module Connector (Not available on this vehicle) |
| 5 | Fuel Filler Door Release Connector |
| 6 | Data Link Connector |
| 7 | Instrument Cluster Connector |
| 8 | Step Well Lamp Connector |
| 9 | Stop Lamp Switch Connector |
| 10 | Trip Computer Switch Computer |
| 11 | Inside Air Temperature Connector |
| 12 | Radio Connector |
| 13 | Hazard Switch Connector |
| 14 | Ambient Light Sensor Connector |
| 15 | Blower Motor and A/C Compressor Connector |
| 16 | Front Cigar Lighter Connector |
| 17 | Cellular Phone Connector |
| 18 | Trunk Release Switch Connector |
| 19 | Blower Motor Resistor Connector |
| 20 | Body Main Wiring Harness to Body Wiring Harness Connector |
| 21 | Body Main Wiring Harness to Passenger Air Bag Harness Connector |
| 22 | Instrument Panel Lamp Switch Connector |
| 23 | Front Upper Dash Speaker Connector |
| 24 | Body Control Module (BCM) Connector |
| 25 | Engine Main Harness to Body Wiring Harness Connector |
| 26 | Engine Main Harness to Body Wiring Harness Connector |
| 27 | Body Control Module (BCM) Connector |
| 28 | Body Control Module (BCM) Connector |
| 29 | Instrument Panel Lamp Connector |
| 30 | Step Well Lamp Connector |
| 31 | Engine Main Harness to Body Wiring Harness Connector |
| 32 | Engine Main Harness to Body Wiring Harness Connector |
| 33 | Side Air bag Harness to Body Wiring Harness Connector |
| 34 | Engine Main Harness to Transmission Selector Harness Connector |
| 35 | Stop Lamp, Traction and Cruise Control Release Switch Connector |
| 36 | Stop Lamp, Traction and Cruise Control Release Switch Connector |
| 37 | Ignition Lock Cylinder Bulb Connector |
| 38 | Cruise Control Switch Connector |
| 39 | Ignition and Start Switch Connector |
| 40 | Windshield Wiper Module |
| 41 | Turn Signal and Headlamp Switch Connector |
| 42 | Steering Wheel SIR Coil Connector |
| 43 | Windshield Wiper and Washer Switch Connector |
| 44 | Ignition and Start Switch Terminal |
| 45 | Ignition and Start Switch Connector |
| 46 | Radio Antenna Amplifier Connector |
| 47 | Radio Antenna Connector |
| Callout | Component Name |
|---|---|
| 1 | Windshield Wiper/Washer Switch Connector |
| 2 | Turn Signal C1 and C2 Connector |
| 3 | Ignition Lock Cylinder Bulb Connector |
| 4 | Ignition and Start Switch Connector |
| 5 | Ignition and Start Switch Terminal |
| 6 | Ignition and Start Switch Connector |
| 7 | Data Link Connector |
| 8 | Stepwell Lamp Connector |
| 9 | Windshield Wiper Module Connector |
| 10 | Cruise Control Switch |
| 11 | SIR Coil Connector |
| 12 | Steering Wheel Inflatable restraint Module Connector |
| 13 | Steering Wheel Horn Connector |
| 14 | Radio Control Switch Connector |
| Callout | Component Name |
|---|---|
| 1 | Body Control Module (BCM) Connector |
| 2 | Body Control Module (BCM) Connector |
| 3 | Body Control Module (BCM) Connector |
| 4 | Body Control Module (BCM) Connector |
| 5 | Engine Main Harness to Body Harness Connector |
| 6 | Body Harness Connector to Engine Main Harness |
| 7 | Body Control Module (BCM) |
| Callout | Component Name |
|---|---|
| 1 | G104 |
| 2 | G102 |
| 3 | G103 |
| 4 | G900 |
| 5 | G901 |
| 6 | G300 |
| 7 | G105 |
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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.