To understand the wiring, you need a wiring diagram specific to your truck's year, engine, and options. These diagrams show the color codes of the wires and their connections. Without that diagram, any information given here would be unreliable and potentially dangerous.
Here's how to find the information you need:
1. Locate your VIN (Vehicle Identification Number): This is crucial for finding the precise wiring diagram for your specific truck.
2. Use a repair manual: A Haynes or Chilton repair manual for your year and model S10 will contain detailed wiring diagrams. These manuals are readily available online and in auto parts stores.
3. Online resources: Some websites may offer free wiring diagrams, but be cautious about their accuracy. Ensure the source is reputable. Searching for "1986 Chevy S10 2.8L 4x4 wiring diagram" might yield some results, but always double-check the VIN compatibility.
4. Dealership: A Chevrolet dealership might have access to the original factory wiring diagrams, but this might come at a cost.
Important Safety Note: Working with automotive wiring can be dangerous. If you're not comfortable working with electricity, it's best to consult a qualified mechanic. Incorrect wiring can lead to electrical fires, damage to your vehicle's electrical system, and even injury.