2003 CADILLAC CTS
115,000 MILES
Avatar
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
Advertisement
Avatar
CARADIODOC
  • CERTIFIED EXPERT
  • 34,306 POSTS
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