Table of Contents
โ ๏ธ DISCLAIMER
Modifying your vehicleโs electrical system carries risks. Disconnect the battery before starting. Consult a professional if unsure. The author is not liable for damages or injuries.
Why Install a Push Button Starter?
- Modernize Your Ride: Replace clunky keys with a sleek, race-inspired button.
- Convenience: Start your engine with a single press.
- Customization: Choose from LED-backlit or color-matched buttons (e.g., Honda S2000, Mitsubishi Evo styles).

๐ Tools & Materials
Icon | Item | Purpose |
---|---|---|
๐ | Push Button (S2000-style) | Durability and OEM compatibility. |
๐ | SPDT 30A Relay | Safely handle starter current. |
๐ | 20-Gauge Wire | Low-current signal wiring. |
๐งฐ | Wire Strippers & Crimpers | Clean connections. |
๐ก๏ธ | In-Line Fuse (10A) | Protect against electrical shorts. |
๐ฅ๏ธ | 3.5mm Internal Power Connector | Secure button wiring (optional). |
Cost: 50โ50โ150 | Time: 2โ4 hours
๐ Step 1: Choose the Button Location
- Flat, accessible surfaces: Dashboard, center console, or OEM key slot.
- Avoid airbags: Check your vehicleโs manual for safe zones.
- Pro Tip: Use a template to mark the hole size (S2000 button: ~1.5″ diameter).
๐ง Step 2: Prepare the Wiring
- Disconnect the battery to prevent shorts.
- Remove steering column shroud to access ignition wires (Honda example):
- 12V Constant (White): Powers the button.
- Ignition (Black/Yellow): Activates the ignition circuit.
- Starter (Black/White): Engages the starter motor.
๐ Step 3: Wire the Button
- Connect power and ground:
- 12V Constant (White) โ Button Pin 2 (via in-line fuse).
- Ground โ Bolt on the chassis (scratch paint for conductivity).
- Relay Setup:
- Pin 30 โ Starter Wire (Black/White).
- Pin 85 โ Ground.
- Pin 86 โ Button Pin 1.
- Pin 87 โ Ignition Wire (Black/Yellow).
๐ฉ Step 4: Mount the Button
- Drill and Dremel: Cut a hole for the button, ensuring a snug fit.
- Secure with epoxy or brackets for vibration resistance.
- Pro Tip: Use rubber grommets to prevent wire chafing.
๐จ Step 5: Test & Troubleshoot
- Reconnect the battery.
- Turn the key to “ON” (do not start).
- Press the buttonโengine should crank.
- No crank? Check:
- Relay connections.
- Fuse integrity.
- Ground points.
- No crank? Check:
๐ Pro Tips for Success
- Immobilizer Bypass: For 2001+ Hondas, use an immobilizer emulator (e.g., AP2MOD).
- LED Backlighting: Tap into the dash lighting circuit for nighttime visibility.
- Waterproofing: Seal the button with silicone if exposed to moisture.

๐ Troubleshooting Table
Issue | Solution |
---|---|
Button Doesnโt Light | Check 12V power and ground connections. |
Starter Clicks, No Crank | Test relay and starter wire continuity. |
Key Stuck in “ON” | Verify ignition wire isnโt shorted. |
โ FAQ
Q: Will this work with keyless ignition?
A: Yes, but retain the key fob for steering lock/unlock.
Q: Will this void my warranty?
A: Potentially. Check your manufacturerโs policies.
โ
Final Result
Your car now boasts a race-ready ignition! Tag your project with #PushButtonPerfection to inspire others.
(Need a relay wiring diagram? Comment below!) ๐๐ง
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