* Faulty Alternator: Even though you've replaced it, the new alternator could be defective. This is less likely but still possible. Get it tested at an auto parts store.
* Faulty Wiring: The problem might be in the wiring leading to or from the alternator. Check for:
* Loose or corroded connections: Inspect all connections at the alternator, battery, and the fuse box. Clean any corrosion with a wire brush and reconnect securely.
* Broken wires: Carefully examine the wiring harness for any cuts, fraying, or damage.
* Faulty Voltage Regulator (if separate): Some alternators have a separate voltage regulator. If yours does, it may have failed, even if the alternator itself is new.
* Faulty Battery: A weak or failing battery can trigger the warning light. Have your battery tested for its charge and overall health.
* Faulty Battery Cable: Similar to wiring, check the battery cables (positive and negative) for corrosion, looseness, or damage.
* Instrument Cluster Issue: While less common, a problem within the instrument cluster itself could cause the light to stay on, even if the charging system is working correctly. This is harder to diagnose and usually requires professional help.
* Faulty Charging System Sensor: There may be a sensor (e.g., a voltage sensor) in the charging system that's providing a false signal to the instrument cluster.
Troubleshooting Steps:
1. Test the new alternator: Have the new alternator tested at an auto parts store to rule out a defective unit.
2. Check all wiring and connections: This is the most likely culprit. Thoroughly inspect every connection, cleaning and tightening as needed.
3. Test the battery: Have the battery load tested to ensure it's holding a charge and not causing the problem.
4. Check the battery cables: Inspect for corrosion, breaks, and secure connections.
5. Check fuses (if applicable): Consult your vehicle's manual to find the relevant fuses for the charging system.
If you've checked all of these and the light persists, it's time to take your Ford Connect to a qualified mechanic. They have the tools and expertise to diagnose the problem accurately. Don't continue driving with the warning light on, as this could damage your battery and leave you stranded.
