To find out why something stopped working:
1. Consult your owner's manual: This is the best place to start. It will show you the location of the fuse boxes and a fuse panel diagram that identifies which fuse controls which circuit (headlights, wipers, radio, etc.).
2. Check the fuses: Carefully inspect all fuses in both fuse boxes. Look for any that are blown (the internal wire will be broken or melted). Replace any blown fuses with fuses of the *same amperage rating*. Using a higher amperage fuse is dangerous and could cause a fire.
3. Identify the circuit: Once you've checked the fuses, if none are blown, the problem likely lies elsewhere. Determine which circuit is affected (e.g., headlights, power windows, radio). This will help narrow down the cause.
4. Look for other problems: If fuses aren't the issue, possible problems could include:
* Wiring issues: Damaged, corroded, or loose wires. This might require tracing the wiring harness.
* Relays: Many electrical components use relays to switch higher currents. A faulty relay can cause a component to stop working.
* Switches: A faulty switch (e.g., headlight switch, power window switch) can interrupt the circuit.
* Component failure: The problem might be in the component itself (e.g., the headlight motor, the radio).
5. Seek professional help: If you're not comfortable troubleshooting electrical systems, it's best to take your Ranger to a qualified mechanic. Improper electrical repairs can be dangerous.
Remember safety first. Always disconnect the negative battery cable before working on the electrical system.
