Car Running Smoothly, Battery Light Aflame A Conundrum

You will find a bad alternator, most likely. Or take a volt meter and test voltage at the battery. Should be about 12 volts, engine off, and ... Since the battery isn't discharging while the truck is sitting probably the diodes are fine. Voltage regulator should not be very expencive, so ... The battery is discharged or weak. · The battery cables are loose. · There's too much acid corrosion on the battery terminals. · The alternator is ... If the battery indicator in your vehicle comes on when you start the car, that's just a normal system test. If the car battery indicator stays on after a few ... 4 Things to Do When Your Car Battery Light Comes On · Check the purchase date of the battery. If it's older than 3 to 5 years, you may need a new ... One possibility, and usually the most common of course is that the alternator has failed, and you are running on your battery. Yes your car has ... 1. Alternator or Voltage Regulator Problem · 2. Loose or Corroded Battery Cable · 3. Old, Discharged, or Weak Battery · 4. Faulty Wiring in the ... Could the cable from the light to the alternator be down to earth (unlikely in a fibreglass car but you never know)? ... running - light comes on The red battery light basically means that there is an issue with your alternator, your battery, or some other part of the charging system. When the car is running the alternator puts out somewhere around 13.8 volts. If your alternator goes bad then your car will run off the battery ...