수리 사례

2026. 6. 30. 작업

증상

Car won't start, horn won't honk, headlights won't come on, what could cause this?

처리 내용

The symptoms all point to a faulty battery, and an incorrect test result for the Autozone battery test. Starting with this: Hitting brakes: Brake lights come on and interior lights dim: a good battery should have no problem driving both the brake lights and interior lights without dimming. The same goes for many of the other tests you've done. If switching on a component that draws 10 A causes dimming, your battery is never going to be able to supply several hundred A to the starter motor. Edit : Try testing the battery voltage under load. Switch on the headlights and measure the voltage. If it's still 12.7V on the battery terminals, one of the battery leads may be broken or corroded. If there's a big voltage drop, the battery is faulty.