1. Verify the New Battery Installation:
* Connections: Double-check that the positive (+) and negative (-) battery terminals are securely connected to the battery and the vehicle. Corrosion can cause poor connections even with new terminals. Clean the terminals and posts thoroughly with a wire brush.
* Terminal Tightness: Make absolutely sure the clamps are firmly tightened. Loose connections can mimic a low-charge issue.
2. Testing & Troubleshooting (In this order):
* Have the Alternator Tested: This is the most likely culprit. A failing alternator can't properly charge the battery. You'll need a professional automotive technician or auto parts store to perform a load test on your alternator. This test measures its output under load. Don't try this yourself unless you have experience with automotive electrical systems.
* Check the Battery Cables: Examine the battery cables (both positive and negative) for any damage like fraying, cracks, or corrosion along their length, not just at the terminals. A break in a cable will prevent proper charging.
* Inspect the Voltage Regulator: The voltage regulator is part of the alternator and controls the charging voltage. A faulty regulator can cause overcharging or undercharging, leading to the battery light staying on. This usually needs testing by a professional as it's built into the alternator assembly.
* Check the Battery Terminals (again): Even after the initial check, sometimes a poor connection can develop quickly due to heat or vibration.
* Check the Charging System Wiring: Look for any damaged or loose wires connected to the alternator, battery, and voltage regulator. This requires some automotive electrical knowledge and may involve using a multimeter.
3. Professional Help:
If you're not comfortable performing these checks yourself, take your Ford Escape to a qualified mechanic or auto repair shop. They have the tools and expertise to diagnose the problem accurately and safely. Simply telling them "battery light stays on, new battery installed" is sufficient.
Important Note: Driving with a malfunctioning charging system can severely damage your battery and potentially lead to your car stranding you. Avoid driving the vehicle extensively until the issue is resolved.
