1991 Honda Civic Ignition Switch Wiring Diagram

The 1991 Honda Civic is a reliable and affordable car that has been on the road for decades. The ignition switch is a critical component of the electrical system, allowing the car to start and run properly. In this article, we will discuss the wiring diagram for the 1991 Honda Civic ignition switch and provide some helpful tips for troubleshooting electrical problems.

What is an Ignition Switch?

The ignition switch is an electrical switch that allows the driver to start and stop the engine. It is connected to the battery, starter motor, and other key electrical components in the car. The ignition switch also controls the power supply to other electrical devices, such as the radio and headlights.

In the 1991 Honda Civic, the ignition switch is located on the steering column near the base of the dashboard. It is typically secured with screws or bolts and can be replaced if necessary.

Wiring Diagram for the 1991 Honda Civic Ignition Switch

The wiring diagram for the 1991 Honda Civic ignition switch is fairly simple and easy to understand. There are four wires that connect to the switch: black/yellow, black/white, yellow, and white. The black/yellow wire is connected to the battery and provides power to the switch. The black/white wire is connected to the starter motor and provides power to start the engine. The yellow wire is connected to the ignition system and provides power to the spark plugs. The white wire is connected to the accessory system and provides power to other electrical devices.

Wire Color Function
Black/Yellow Battery Power
Black/White Starter Motor Power
Yellow Ignition System Power
White Accessory Power

Troubleshooting Electrical Problems

If you are experiencing electrical problems with your 1991 Honda Civic, there are a few things you can do to troubleshoot the issue. Here are some common problems and solutions:

The Car Won’t Start

If your car won’t start, it could be a problem with the ignition switch or the starter motor. Check the wiring diagram to make sure the connections are secure and there are no breaks in the wires. If everything looks good, try jumping the car to see if the battery is dead. If the battery is fine, you may need to replace the ignition switch or the starter motor.

The Radio and Lights Won’t Turn On

If your radio and lights won’t turn on, it could be a problem with the accessory power. Check the wiring diagram to make sure the white wire is connected properly and there are no breaks in the wire. If everything looks good, check the fuses to make sure they are not blown.

The Car Stalls or Runs Roughly

If your car stalls or runs roughly, it could be a problem with the ignition system. Check the wiring diagram to make sure the yellow wire is connected properly and there are no breaks in the wire. If everything looks good, check the spark plugs to make sure they are not fouled. You may also need to replace the ignition coil or distributor.

The Car Won’t Shift Out of Park

If your car won’t shift out of park, it could be a problem with the brake pedal switch or the shift interlock solenoid. Check the wiring diagram to make sure the brake pedal switch is working properly and there are no breaks in the wires. If everything looks good, check the shift interlock solenoid to make sure it is not stuck or damaged.

The Car Won’t Start in Cold Weather

If your car won’t start in cold weather, it could be a problem with the starter motor or the battery. Check the wiring diagram to make sure the connections are secure and there are no breaks in the wires. If everything looks good, try using a block heater or battery warmer to keep the engine warm.

Conclusion

The 1991 Honda Civic ignition switch wiring diagram is an important resource for anyone who owns or works on these cars. By understanding how the electrical system works and troubleshooting common problems, you can keep your car running smoothly and avoid costly repairs. If you need further assistance or advice, don’t hesitate to consult a certified mechanic or electrical technician.