1. Identify the Wires:
* Old Alternator: Use a multimeter to test the wire's function on the old alternator. Determine if it's for:
* Battery Terminal: This is the main power output from the alternator.
* Field Terminal: This is the wire that provides the excitation current to the alternator rotor.
* Sense Terminal: This wire sends a signal to the voltage regulator to adjust output voltage.
* Ground: Provides a ground path for the alternator.
* New Alternator: Identify the wires on the new alternator by comparing to its wiring diagram (often found in the alternator packaging or online).
2. Matching Wires:
* Match the Function: Connect the wires with the same functions between the old and new alternators.
* Unused Wire: The extra wire on the old alternator is likely the one you won't need.
3. Troubleshooting and Testing:
* Verify the New Alternator's Wiring: Double-check that you've connected all the necessary wires correctly to the new alternator.
* Test for Proper Operation: Start the engine and check if the battery is charging properly using a voltmeter.
Important Notes:
* Consult the Service Manual: Refer to your 1986 Ford Escort's service manual for detailed wiring diagrams and instructions specific to your vehicle.
* Professional Help: If you're unsure about any of the steps, it's best to seek assistance from a qualified mechanic. Incorrect wiring can damage your alternator or other electrical components.
Let me know if you have any more information about the alternator or the specific wires you are dealing with, and I can provide more tailored advice.
