Battery Light's Discrepancy Car Runs Flawlessly

but everything runs fine electrically when running...as in lights ... hi all , wife went to open car today and noticed the battery light ... If you are saying that the battery light was on when the engine wasn't running that is normal. The alternator can't charge the battery when the ... A battery warning light that stays on while driving indicates that the battery is no longer being charged by the alternator and is running on its own charge. Check the PCM for fault codes, there are other charging system problems that can cause the charging system light to illuminate. 1 Like. Even if the car seems to run fine, this light indicates that something needs attention. Ignoring it can lead to bigger problems, such as a dead ... Many reasons for this, bad battery, bad alternator, etc. I suggest checking the battery voltage, car off, and then hooking the battery up to a 2-10 amp charger ... 1. Alternator or Voltage Regulator Problem · 2. Loose or Corroded Battery Cable · 3. Old, Discharged, or Weak Battery · 4. Faulty Wiring in the ... ... fine. But in reality, there's a few reasons why you can have a good ... Flashing Battery Light on a Car: 5 Common Causes & Fix. Honest ... I hooked up a voltage meter to the battery with the car off, and it gets a solid 12.5v (fairly newish battery.) With the car running, I tested ... It seems like the only possible sources of this problem are: loose belt (I don't think so), bad ground (seems ok, but maybe not), bad alternator ...