Hooked Battery Up Backwards Now Car Won’t Start

If you accidentally connected the battery backward and now your car won’t start, it’s possible that some electrical components may have been damaged due to the reverse polarity.

Reversing the battery’s polarity can cause electrical problems that prevent the car from starting or functioning properly.

To address this issue, you can follow these steps:

1. Check for Visible Damage: Inspect the battery terminals, fuses, and any visible wiring for signs of damage or burning.
2. Replace Blown Fuses: If any fuses have blown due to the reversed polarity, replace them with fuses of the correct rating.
3. Inspect Other Electrical Components: Check other critical electrical components such as the alternator, starter, and engine control unit (ECU) for any signs of damage or malfunction. Consult a professional mechanic if necessary.
4. Reset the ECU: Disconnect the battery, wait for a few minutes, and then reconnect it in the correct orientation. This can sometimes reset the ECU and help resolve any electrical issues.
5. Seek Professional Help: If the car still does not start or if you notice any significant damage, it’s advisable to consult a professional mechanic or an automotive technician for a thorough inspection and repair.

It’s crucial to be cautious when handling electrical components and to ensure that the battery is always connected in the correct polarity to prevent further damage to the car’s electrical system.