* Wiring Issues:
* Damaged or corroded wiring: Check all wiring connections between the battery, alternator, and starter. Look for frayed wires, corrosion, or loose connections. Pay close attention to the large cables. Cleaning terminals with a wire brush and applying dielectric grease is crucial.
* Faulty alternator wire: A break or short in the wire leading from the alternator to the battery could prevent proper charging.
* Bad voltage regulator (internal or external): Even with a new alternator, the voltage regulator (which controls the alternator's output) might be failing, preventing it from charging correctly. Some older Chryslers have external regulators.
* Faulty ignition switch: A failing ignition switch can draw power even when the car is off, draining the battery.
* Parasitic Drain:
* Something constantly drawing power: Even when the car is off, something might be drawing power from the battery. This could be a faulty radio, interior light, dome light, clock, or a short in the wiring somewhere. Use a multimeter to check for current draw with the car off (a small draw is normal, but anything significant is a problem).
* Other possibilities:
* Faulty battery: While you've replaced it, a rare possibility is that the new battery is defective. Have it tested at an auto parts store to be sure.
* Bad ground: A poor ground connection can prevent the battery from charging properly. Check the main ground cable from the engine block to the chassis.
Troubleshooting Steps:
1. Visual Inspection: Thoroughly inspect all wiring connections related to the battery and alternator. Look for any signs of damage, corrosion, or loose connections. Clean and tighten any connections you find problematic.
2. Battery Load Test: Have the new battery load tested at an auto parts store to rule out a faulty battery.
3. Alternator Output Test: Have the alternator tested. A load test will show if it's putting out the correct voltage and amperage at idle and higher RPMs. Many auto parts stores offer this service for free.
4. Parasitic Drain Test: Use a multimeter to measure the current draw from the battery while the car is off. Disconnect the negative battery terminal, and connect the multimeter in series between the terminal and the negative cable. A significant drain indicates a problem. You may need to systematically disconnect fuses and accessories to pinpoint the source.
5. Voltage regulator check (if applicable): If your LeBaron has an external voltage regulator, have it tested or replace it.
If you're not comfortable performing these tests, take the car to a qualified mechanic. They have the tools and expertise to diagnose the problem quickly and efficiently. The problem is likely within the charging system wiring or a parasitic draw, but a systematic approach is needed to identify the exact cause.
