Charging system

1998 CHEVROLET SILVERADO
150,000 MILES • V8 • 4WD • AUTOMATIC
Avatar
NSTEELMAN
  • MEMBER
  • 1 POST
After jumpstarting my truck it only runs a few minutes, all lights go dim and eventually the whole truck shuts off, lights and all.
Nov 2, 2017 at 8:32 AM
Advertisement
Avatar
MHPAUTOS
  • ✓Experienced Mechanic
  • 31,937 POSTS
Check battery with a load test, you may have to do a bench charge first. also, check the alternator output voltage at the main terminal on the back of the alternator, you should be seeing around 14.5 volts. please post back your findings.
Nov 2, 2017 at 8:34 AM
Avatar
NSTEELMAN
  • MEMBER
  • 1 POST
Alternator reads 12.21 battery has been charging for an hour.
Nov 2, 2017 at 8:45 AM
Avatar
MHPAUTOS
  • ✓Experienced Mechanic
  • 31,937 POSTS
Alternator out put is to low, get it off and bench tested for internal faults.
Nov 2, 2017 at 9:08 AM
Add a reply
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 new question

Frequently Asked Problems for This Vehicle