2003 Cadillac Cts Battery Light Electrical Came On Charge Lights Got Dim Gas

2003 CADILLAC CTS
115,000 MILES
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BBBROW2
  • MEMBER
  • 1 POST
Battery light and electrical light came on and said "no charge" then lights got dim and gas pedal stopped working and car died. I jumped it and it ran for a few mins but no interior lights worked nor did the gas pedal. Took battery off and it is fine. What is wrong?....alternator?
Feb 26, 2013 at 3:04 AM
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CARADIODOC
  • ✓ASE Certified Mechanic
  • 34,321 POSTS
  • ASE Certified Mechanic
Yup. The generator is not recharging the battery while you're driving or it has a bad diode. You can verify that with an inexpensive digital voltmeter. Measure the battery voltage with the engine running and while the problem is occurring. It must be between 13.75 and 14.75 volts. If it is low, around 12.6 volts, suspect the generator.
Feb 26, 2013 at 3:47 AM
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