The 1986 Ford Bronco is a classic SUV that still holds a lot of value today. However, if you’re having issues with the wiring, it can be a nightmare to solve. In this article, we’ll delve into the 1986 Ford Bronco wiring diagram and provide you with all the information you need to get your SUV back on the road.
Overview of the 1986 Ford Bronco Wiring Diagram
Before we dive into the specifics of the wiring diagram, let’s take a high-level overview of the system. There are three main components to the wiring diagram:
- The Power Distribution Box
- The Fuse Panel
- The Wiring Harness
The Power Distribution Box is located in the engine compartment and contains various high-current fuses and relays. The Fuse Panel is located under the steering column and contains low-current fuses for various circuits. The Wiring Harness connects all the electrical components of the vehicle together.
The Power Distribution Box
The Power Distribution Box is responsible for providing power to various high-current components in the vehicle. These components include the Starter Motor, Fuel Pump, Alternator, and various other accessories. The Power Distribution Box contains various fuses and relays that are responsible for protecting the electrical system from short circuits and overloads.
We’ve included a table below that lists the various fuses and relays in the Power Distribution Box and their functions:
| Component | Fuse/Relay | Function |
|---|---|---|
| Starter Motor | Starter Relay | Engages the Starter Motor when the ignition is turned on |
| Fuel Pump | Fuel Pump Relay | Provides power to the Fuel Pump when the ignition is turned on |
| Alternator | Alternator Fuse | Protects the Alternator from overloading the electrical system |
The Fuse Panel
The Fuse Panel is responsible for protecting low-current circuits in the vehicle. These circuits include the Horn, Lights, Radio, and various other accessories. The Fuse Panel contains various fuses that are responsible for protecting the electrical system from short circuits and overloads.
We’ve included a table below that lists the various fuses in the Fuse Panel and their functions:
| Circuit | Fuse | Function |
|---|---|---|
| Horn | 15A | Provides power to the Horn when the Horn button is pressed |
| Lights | 10A, 15A | Provides power to the Headlights, Tail Lights, and other exterior lights |
| Radio | 10A | Provides power to the Radio and other interior accessories |
The Wiring Harness
The Wiring Harness is responsible for connecting all the electrical components of the vehicle together. It includes various connectors, wires, and sensors that allow the various components to communicate with each other. If you’re experiencing electrical issues with your Bronco, then the Wiring Harness is a good place to start.
There are various tests you can perform on the Wiring Harness to check for continuity and shorts. We’ve included some frequently asked questions below to help you get started:
FAQ
How do I test the continuity of a wire?
To test the continuity of a wire, you’ll need a multimeter. Set the multimeter to the continuity setting and touch the positive and negative leads to the two ends of the wire. If you hear a beep, then the wire has continuity. If you don’t hear a beep, then the wire is broken.
How do I test for a short circuit?
To test for a short circuit, you’ll need a multimeter. Set the multimeter to the resistance setting and touch the positive and negative leads to either end of the wire. If the resistance reading is close to zero, then there is a short circuit in the wire.
What should I do if I find a broken wire or short circuit?
If you find a broken wire or short circuit, then you’ll need to repair or replace the affected component. Depending on the severity of the issue, you may need to replace the entire Wiring Harness.
Can I use a Wiring Harness from a different year model?
No, you should always use a Wiring Harness that is designed for your specific year model. Using a Wiring Harness from a different year model can result in compatibility issues and electrical problems.
Is it safe to work on the electrical system of my vehicle?
The electrical system of your vehicle can be dangerous if you don’t take proper precautions. Always wear protective gear, such as gloves and safety glasses, when working on the electrical system. Additionally, make sure the battery is disconnected before working on any electrical components.
Conclusion
Overall, the 1986 Ford Bronco wiring diagram can be a challenge to decipher if you’re not familiar with electrical systems. However, by understanding the various components and tests, you can troubleshoot and repair any issues you encounter. If you’re still having trouble, it’s always best to consult a professional mechanic.
