Charging issue

2005 HONDA CIVIC
60,000 MILES • 1.7L • 4 CYL • 2WD • AUTOMATIC
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GABRIEL ANDRES ROMERO
  • MEMBER
  • 1 POST
Hello, I purchased a new battery and a new alternator. In low rpm's when the lights and A/C are on, the volt drops 12.6. The alternator has 4 pin connector but the male connector only have three wires. Thank you
Nov 19, 2018 at 8:04 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,246 POSTS
Hi and thanks for using 2CarPros.com.

When there is nothing electrical turned on, check the voltage at the battery. It should be right around 14 volts. Now, with the AC running, the blower motor for the AC, the lights and a cooling fan running, and at idle speed, 12.6 volts is fine.

Here is a link that shows how to check the alternator output. Do this and let me know what you find.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Take care,
Joe

Nov 19, 2018 at 10:16 AM
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