The distributor's cap will have the numbers 1-6 on it, corresponding to the spark plug wires. However, the physical placement of the wires on the distributor cap will *not* necessarily be in numerical order. You'll need to use the firing order to correctly place the wires.
Important Note: Always consult a repair manual specific to your vehicle's year and engine for the most accurate and detailed information. A Haynes or Chilton manual for your 1992 Ford Aerostar will provide diagrams and instructions.
