The 1990 Honda Fourtrax 300 is a popular ATV model because of its strength and durability. However, just like any other ATV, electrical issues can arise. In this article, we will provide a wiring diagram for the 1990 Honda Fourtrax 300, and we will also answer some frequently asked questions related to this model’s electrical system.
Wiring Diagram
Before we dive into the wiring diagram, let’s discuss the electrical system of the 1990 Honda Fourtrax 300. This ATV has a 12-volt electrical system, which consists of a battery, alternator, regulator, fuse box, and various electrical components such as lights, ignition system, and starter motor.
Now, let’s take a look at the wiring diagram:
Color | Function | Wire Gauge | Location |
Black/Yellow | Main Switch Main Feed | 14 | Battery to Main Switch |
Yellow/Red | Main Switch Acc. Feed | 14 | Battery to Main Switch |
Red/White | Regulator/Rectifier Input | 18 | Main Switch to Regulator/Rectifier |
Green/White | Regulator/Rectifier Output | 18 | Main Switch to Regulator/Rectifier |
Brown | Ignition Pulse Generator | 18 | Pulse Generator to CDI Unit |
Blue/White | Ignition Coil Positive | 18 | CDI Unit to Ignition Coil |
Black | Starter Motor Negative | 14 | Battery to Starter Motor |
Red | Starter Motor Positive | 14 | Starter Switch to Starter Motor |
Black/White | Headlight Low Beam | 18 | Main Switch to Headlight |
Black/Yellow | Headlight High Beam | 18 | Main Switch to Headlight |
Note that this wiring diagram is for reference purposes only. Always refer to the service manual for accurate wiring diagrams and procedures.
FAQs
1. What are the signs of a bad alternator in the 1990 Honda Fourtrax 300?
A bad alternator can cause various electrical problems in the 1990 Honda Fourtrax 300. Some of the signs of a bad alternator include:
- Dimming or flickering headlights
- Difficulty starting the engine
- Dead battery
- Intermittent electrical problems
2. How do I test the regulator/rectifier in the 1990 Honda Fourtrax 300?
You can test the regulator/rectifier in the 1990 Honda Fourtrax 300 using a multimeter. First, disconnect the regulator/rectifier from the electrical system. Then, set your multimeter to the diode test mode and connect the positive lead to the regulator/rectifier’s positive terminal, and the negative lead to the negative terminal. If the multimeter shows a reading between 0.2 and 0.5 volts, the regulator/rectifier is working correctly. If the reading is outside this range, you need to replace the regulator/rectifier.
3. What are the signs of a bad ignition coil in the 1990 Honda Fourtrax 300?
A bad ignition coil can cause the engine to misfire or not start at all. Some of the signs of a bad ignition coil in the 1990 Honda Fourtrax 300 include:
- Engine misfire or hesitation
- No spark at the spark plug
- Difficulty starting the engine
4. How do I test the ignition pulse generator in the 1990 Honda Fourtrax 300?
You can test the ignition pulse generator in the 1990 Honda Fourtrax 300 using a multimeter. First, disconnect the ignition pulse generator from the electrical system. Then, set your multimeter to the resistance mode and connect the leads to the ignition pulse generator’s terminals. The resistance should be between 120 and 180 ohms. If the resistance is outside this range, you need to replace the ignition pulse generator.
5. What are the signs of a bad starter motor in the 1990 Honda Fourtrax 300?
A bad starter motor can cause the engine not to crank or start. Some of the signs of a bad starter motor in the 1990 Honda Fourtrax 300 include:
- Clicking sound when you turn the key
- No sound when you turn the key
- Slow cranking
Conclusion
In conclusion, the 1990 Honda Fourtrax 300 wiring diagram is essential for troubleshooting and repairing electrical issues. Always refer to the service manual for accurate wiring diagrams and procedures, and use a multimeter to test electrical components. If you’re unsure how to perform electrical repairs, it’s best to consult a professional mechanic.