my Honda CR-V's headlights go dim when I accelerate what's causing it

Solution

1. Preparation

• Gather tools: multimeter, wrench set, socket set, and a battery terminal cleaner.
• Ensure the vehicle is parked on a level surface and turned off.

2. Inspect Battery Connections

• Use a wrench to disconnect the negative terminal of the battery.
• Clean any corrosion from both terminals using a terminal cleaner.
• Reconnect the battery terminals, ensuring they are tight and secure.

3. Test the Battery

• Connect the multimeter to the battery: red lead to positive, black lead to negative.
• Check voltage: A healthy battery should read around 12.6 volts when off and 13.7-14.7 volts when the engine is running.
• If the reading is below these values, consider replacing the battery.

4. Check the Alternator

• With the multimeter still connected, check the voltage at the alternator output terminal while the engine is running.
• Voltage should be between 13.7-14.7 volts. If it is below, the alternator may need replacement.
• Inspect the alternator's drive belt for tension and wear; replace if necessary.

5. Inspect Wiring and Ground Connections

• Visually check all wiring from the battery to the alternator for any signs of damage or wear.
• Ensure all ground connections are clean and tight, particularly the ground cable connected to the chassis.