얼터네이터 교환 수리 사례
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공임
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부품비
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소요 시간
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2026. 6. 30. 작업
난이도 & 준비물
증상
one wire alternator
처리 내용
The one tool you will need to purchase / borrow is a Volt Ohm Meter (sometimes called a Multimeter). Then you need to use it to read voltage AT THE BATTERY, before the car is started and after the car is started. My guess is you won't see any voltage difference. Before the car is started, I would guess you'd see voltages like 12.6v or so. After the car is started you SHOULD see 13.7v or so. If you see no difference in voltage between car off and car running, that means the alternator isn't working to put out a charge (or its working great, but you've got a short in wiring external to the alternator somewhere.) Don't forget that with a one wire alternator, the ground circuit is made through the alternator's mounting bosses to the engine block. Do you have any pretty components in that chain that have powder coated paint? Ouch. That won't work. When you installed the engine where did you place the engine block ground strap? Usually its a large braided and flattened copper wire, attached
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For example, it seems switching from some high wattage headlights to much lower wattage LED's frees up more of the alternator's power capacity. But, does this mean the alternator (or other electrical components like the voltage regulator) will start to run hotter? (to dissipate excess power via heat?) Or, does the decrease in overall electrical load simply get handled by just easing up the load on the engine making it easier to spin the alternator in the first place?