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

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 25, 2013 at 7:04 PM
Advertisement
Avatar
CARADIODOC
  • ✓Experienced Mechanic
  • 34,367 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 25, 2013 at 7:47 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.