SPONSORED LINKS

Drained new battery

Tiny
MSAKOWSKI
  • MEMBER
  • 1971 CHEVROLET CORVETTE
  • V8
  • FWD
  • AUTOMATIC
  • 100 MILES
I just purchased a 71 454 corvette at mecum in fla and it had a dead battery. I replaced it and it ran fine. One week later and it's completely dead again. Why? I'm not a expert mechanic.
Sunday, February 20th, 2011 AT 9:56 PM

2 Replies

Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
Test alternator voltage at battery while car is running. Should be 13.5-14.X volts. Even if it charges, there may be drain thru alternator while car sits. Rare, but it does happen.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Sunday, February 20th, 2011 AT 10:02 PM
Tiny
FIXITMR
  • MECHANIC
  • 9,990 POSTS
If that car has an external voltage regulator the drain could be from that.
Was this
answer
helpful?
Yes
No
Sunday, February 20th, 2011 AT 10:04 PM

Please login or register to post a reply.

Related Battery Drain Content

How to Test for a Battery Drain-Draw
VIDEO
How to Test for a Battery Drain-Draw
Instructional repair video
Battery Drain Repair
GUIDE
Battery Drain Repair
We are a team of ASE certified mechanics who have created this battery draw or dead overnight guide to help you save money by walking you through what to look for first. A...
VIEW MORE

Sponsored links