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DIY Push Button Start Ignition Switch Wiring

Installing a push button start ignition switch is a great way to modernize an older vehicle or replace a failing ignition system. Here’s a general guide on how to wire a DIY push button start ignition switch. Note that specific wiring might vary based on the vehicle and the type of switch, so it’s crucial to refer to your vehicle’s wiring diagram.

Tools and Materials Needed

  • Push button start switch
  • Relay
  • Wiring kit
  • Wire strippers
  • Screwdrivers
  • Electrical tape
  • Multimeter

Step-by-Step Installation Guide

1. Disconnect the Battery

Always start by disconnecting the negative terminal of the battery to avoid any electrical shorts or shocks.

2. Plan Your Wiring Route

Identify a suitable location for the push button switch. It should be easily accessible from the driver’s seat but also discreet enough for security purposes.

3. Install the Relay

A relay is necessary to handle the high current required to start the car. Install the relay in a location close to the starter and battery but protected from heat and moving parts.

4. Wiring the Relay

  • 85 (Coil Ground): Connect this to a ground.
  • 86 (Coil Power): Connect this to one terminal on the push button.
  • 87 (Normally Open Contact): Connect this to the starter solenoid wire.
  • 30 (Common Contact): Connect this directly to the positive battery terminal using a fuse (typically 30 amps).

5. Connect the Push Button Switch

  • Connect the remaining terminal of the push button to an ignition wire (this wire is only hot when the ignition is on) using a fuse (typically 5-10 amps). This setup ensures the vehicle can only be started when the ignition is on.

6. Check Your Connections

Use a multimeter to ensure all connections are secure and correct. There should be no continuity when the push button is not pressed (relay should not activate), and continuity when it is pressed (relay should activate).

7. Reconnect the Battery and Test

Once all wiring is confirmed and secure, reconnect the battery. Test the push button to ensure it starts the vehicle. Check for any unusual behaviors like the car starting without pressing the button or the starter staying engaged.

8. Secure and Insulate All Wiring

Use electrical tape or heat shrink tubing to insulate all connections. Secure the wiring away from heat sources and moving parts with zip ties.

9. Final Testing

Do multiple tests to ensure everything is working smoothly and reliably. Check during different times of the day and in different weather conditions.

Safety Tips

  • Always use fuses as close to the battery connection as possible to protect the wiring.
  • Make sure all electrical connections are insulated to prevent shorts.
  • Consider installing a hidden kill switch as an additional security measure against theft.

This guide gives you a basic understanding of how to install a push button start system. It’s very important to consult a professional or a detailed manual specific to your vehicle model to address any peculiarities or additional safety considerations.

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