Here's how to find the correct wiring:
1. Consult a Repair Manual: The most reliable source is a repair manual specific to your year and engine of Ford Windstar. These manuals (like Haynes or Chilton) provide detailed diagrams and instructions, often including color-coded wiring charts.
2. Online Resources: Websites like Ford's own website (if they offer such information for your model year), or reputable automotive forums (like Ford-specific forums) might have diagrams or user-contributed information. However, *always cross-reference this with information from a repair manual.* Online information can be inaccurate or outdated.
3. Identify the Coil Pack and Spark Plug Wires: The coil pack (or individual coils, depending on the year) itself may have markings indicating which cylinder each wire connects to. Look closely for numbers, letters, or even a slightly different molded texture to differentiate the outputs. The spark plug wires themselves may also have numbers or markings, although these can wear off over time.
4. Tracing Wires (Use Caution): As a last resort and only if you're very comfortable working with automotive systems, you *could* carefully trace the wires from the coil pack to the spark plugs. This is risky and unreliable, especially if the wires have been tampered with before. This method requires good understanding of firing order.
Important Considerations:
* Firing Order: The engine's firing order is crucial. This is the sequence in which the cylinders fire. The repair manual will specify this order for your engine. The spark plugs must be wired to the coil pack in the correct firing order.
* Multiple Coil Packs: Some Windstars have multiple coil packs. Make sure you trace each wire back to its appropriate coil and spark plug.
* Safety: Disconnect the negative battery terminal before working on the ignition system. High voltage can cause a painful shock.
In short: Don't attempt this without a reliable wiring diagram from a repair manual. Improper wiring can lead to misfires, engine damage, and potentially dangerous situations. If you're not comfortable working on your vehicle's electrical system, it's best to take it to a qualified mechanic.
