Tools and Materials Needed:
- AutoMeter tachometer
- Wiring harness
- Crimp connectors
- Electrical tape
- Wire strippers
- 10mm wrench
- 12mm wrench
- Phillips head screwdriver
1. Disconnect the battery. This is the most important step, as it will prevent any electrical accidents while you are working. To disconnect the battery, simply use a 10mm wrench to loosen the negative (black) battery terminal and remove it from the battery post.
2. Locate the factory tachometer wire. The factory tachometer wire is located behind the instrument cluster. To access it, you will need to remove the instrument cluster bezel. To do this, use a Phillips head screwdriver to remove the two screws that hold the bezel in place. Once the screws are removed, gently pry the bezel off of the instrument cluster.
3. Connect the AutoMeter tachometer wire to the factory tachometer wire. Use a crimp connector to connect the AutoMeter tachometer wire to the factory tachometer wire. Make sure that the connection is secure.
4. Connect the ground wire to a grounding point. Use a crimp connector to connect the ground wire to a grounding point. A grounding point is any metal surface that is connected to the chassis of the car.
5. Connect the power wire to a switched power source. Use a crimp connector to connect the power wire to a switched power source. A switched power source is any wire that is only powered when the ignition is turned on.
6. Test the tachometer. Turn on the ignition and check to make sure that the tachometer is working properly.
7. Reinstall the instrument cluster bezel. Once you have tested the tachometer, reinstall the instrument cluster bezel. To do this, simply snap it back into place.
8. Reconnect the battery. Reconnect the negative (black) battery terminal to the battery post and tighten it with a 10mm wrench.
