Why does the battery warning light stay on?
2 Answers
The battery warning light staying on may be due to loose battery terminals, a loose alternator belt, or a fault in the charging circuit system. Here are the details: 1. Loose battery terminals: It is necessary to check the positive and negative terminals of the battery for looseness and severe oxidation, which can cause poor contact. The battery terminals should be cleaned and tightened. 2. Loose alternator belt: Check if the alternator belt is loose or slipping. If it is loose or slipping, the battery cannot be charged, and the battery warning light will come on. It is necessary to go to a 4S shop for inspection or repair. 3. Charging circuit system fault: It is necessary to go to a 4S shop for a thorough inspection and repair of the charging circuit system.
Having driven for over 20 years, I'm all too familiar with that battery warning light staying on. That little red light basically signals trouble with the charging system. The most common culprit is a misbehaving alternator - whether from belt slippage or worn bearings preventing proper battery charging. I've even encountered trickier situations like rodents chewing through wiring causing poor connections. This isn't an issue to ignore - last week my neighbor kept driving until their car completely lost power mid-highway. Quick diagnostic tip: if the light turns off after starting, it's probably fine; but if it stays illuminated while driving, get it checked immediately. Best to use a voltmeter - readings below 13 volts confirm charging system failure. Remember to check for oil stains near the alternator during car washes, as that often precedes bearing leaks.
