how to troubleshoot the battery charging issue in my Toyota Tacoma N300 (2016-Present)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Safety gear: gloves and safety goggles.
• Ensure the vehicle is parked on a level surface and the engine is off.

2. Inspect Battery and Terminals

• Disconnect the negative battery cable using a socket set.
• Clean any corrosion from the battery terminals using a wire brush.
• Ensure that the connections are tight and secure when reattaching the cables.

3. Test and Replace the Battery

• If the battery voltage is below 12.6 volts, perform a load test.
  • Use a battery load tester to check if the battery can hold a charge.
• If the battery fails the load test, replace it with a new battery that meets OEM specifications.

4. Check and Replace the Alternator

• If the alternator voltage is below 13.5 volts with the engine running, it may need replacement.
• Disconnect the battery and remove the alternator belt using a wrench.
• Unplug the electrical connectors from the alternator.
• Remove the mounting bolts and take out the alternator.
• Install the new alternator by reversing the removal steps.
• Reconnect the battery and test the voltage again.

5. Inspect Wiring and Connections

• Check the wiring harness from the alternator to the battery for any signs of fraying or damage.
• Repair or replace any damaged wiring as needed.
• Ensure all connections are secure and free from corrosion.