1999 CHRYSLER LHS BATTERY LIGHT

  • Tiny
  • thomas6656
  • 1999 Chrysler LHS

1999 Chrysler LHS

The battery light keeps coming on. I have Change the battery as well as the alternator and belt.

Tuesday, March 2nd, 2010 AT 11:56 AM

1 Answer

  • Tiny
  • caradiodoc
  • Expert
  • 24,890 posts

Grab a cheap digital voltmeter and measure the voltage across the two batery terminals while the engine is running. It must be between 13.75 and 14.75 volts. If it is around 12.0 to 12.4 volts, the charging system is indeed dead.

If it's dead, you'll need to measure the voltages on the two small wires plugged into the back of the alternator. One must have full battery voltage. The second one will have less, but it must not be 0 volts. Those voltages will only be there steady when the engine is running. Those two readings will determine the direction to follow next. The possibilities on the second wire are 0 volts, exactly the same voltage on both wires, or something in between.

Caradiodoc

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Wednesday, March 3rd, 2010 AT 12:53 AM

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