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Swapping 2004+ Grand Prix seats into a 1997-2003 Grand Prix requires proper wiring to ensure power seat movement and heated seat functionality (if equipped). This guide will walk you through the steps to wire the driver and passenger seats correctly.
- Soldering iron (optional but recommended)
- Electrical tape or heat shrink tubing
- 12-gauge and 16-gauge automotive wire
- Inline fuse holder with 30A fuse
- 30A relay (optional but recommended for heated seats)
- Multimeter/test light
- Butt connectors or solder
- **Black** – Ground
- **Orange** – Heated seat power
- **Blue/White** – Heated seat switch signal
- **Yellow** – Seatbelt sensor (optional)
- **Gray/Black** – Airbag (DO NOT CONNECT)
- **Black** – Ground
- Splice the Red/White wire (04+ seat) into the Orange wire (97-03 car).
- Use a 12-gauge wire for this connection.
- Optionally, run a new fused 12V line from the fuse box or battery if extra power is needed.
- Connect the Black wire (seat ground) to the chassis ground.
- Verify a good ground connection using a multimeter.
- Test seat movement. If the seat moves as expected, the wiring is correct.
- Use a 30A inline fuse for protection.
- This wire should connect to the Orange wire on the 04+ seat.
- Find the factory heated seat switch (if your car had heated seats originally).
- If equipped, splice the Blue/White wire from the switch to the seat.
- If no factory heated seat wiring exists, install a switch.
- Wire a 12V switch to control the Blue/White wire (seat signal).
- Add a relay if necessary to prevent overloading the switch.
- Ground the seat properly.
- Test the heated seats. The seats should heat up within a few minutes when powered on.
- Ensure the seatbelt sensor wiring is correctly adapted or bypassed.
- Double-check all functions (power adjustment, heating, etc.) before reinstalling seat bolts.
If you encounter issues, use a multimeter to check voltage and ground continuity.
Happy modding!
Tools & Materials Needed
- Wire strippers/crimpers- Soldering iron (optional but recommended)
- Electrical tape or heat shrink tubing
- 12-gauge and 16-gauge automotive wire
- Inline fuse holder with 30A fuse
- 30A relay (optional but recommended for heated seats)
- Multimeter/test light
- Butt connectors or solder
Step 1: Identifying the Wires
04+ Grand Prix Seat Wiring Colors:
- **Red/White** – Main power (12V+)- **Black** – Ground
- **Orange** – Heated seat power
- **Blue/White** – Heated seat switch signal
- **Yellow** – Seatbelt sensor (optional)
- **Gray/Black** – Airbag (DO NOT CONNECT)
97-03 Grand Prix Seat Wiring Colors:
- **Orange** – Main power (12V+)- **Black** – Ground
Step 2: Wiring the Power Seats
- Locate the factory power seat connector under the floorboard.- Splice the Red/White wire (04+ seat) into the Orange wire (97-03 car).
- Use a 12-gauge wire for this connection.
- Optionally, run a new fused 12V line from the fuse box or battery if extra power is needed.
- Connect the Black wire (seat ground) to the chassis ground.
- Verify a good ground connection using a multimeter.
- Test seat movement. If the seat moves as expected, the wiring is correct.
Step 3: Wiring Heated Seats (If Equipped)
- Run a 12V fused wire from the fuse box (or battery) to power the heated seats.- Use a 30A inline fuse for protection.
- This wire should connect to the Orange wire on the 04+ seat.
- Find the factory heated seat switch (if your car had heated seats originally).
- If equipped, splice the Blue/White wire from the switch to the seat.
- If no factory heated seat wiring exists, install a switch.
- Wire a 12V switch to control the Blue/White wire (seat signal).
- Add a relay if necessary to prevent overloading the switch.
- Ground the seat properly.
- Test the heated seats. The seats should heat up within a few minutes when powered on.
Step 4: Finalizing the Installation
- Secure all wiring connections with heat shrink tubing or electrical tape.- Ensure the seatbelt sensor wiring is correctly adapted or bypassed.
- Double-check all functions (power adjustment, heating, etc.) before reinstalling seat bolts.
Conclusion
By following this guide, you can successfully wire both driver and passenger seats from a 2004+ Grand Prix into your 1997-2003 Grand Prix, ensuring full power seat and heated seat functionality. Always test your connections before securing everything permanently.If you encounter issues, use a multimeter to check voltage and ground continuity.
Happy modding!
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