SPONSORED LINKS

1997 Chevy Suburban Battery voltage drops

Tiny
NILESFREE
  • MEMBER
  • 1997 CHEVROLET SUBURBAN
  • V8
  • 2WD
  • AUTOMATIC
  • 170,000 MILES
When I have both the front and rear ac on at full blast and the truck is not moving but in gear, the battery voltage begins to drop. I have already replaced the alternator and it didn't help. Any ideas?
Tuesday, May 18th, 2010 AT 4:47 PM

3 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Hi there,

What is the alternator out put readings when you do this? And is the idle a bit low and the alternator has not kicked in?

Mark (mhpautos)
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
-1
Tuesday, May 18th, 2010 AT 5:18 PM
Tiny
NILESFREE
  • MEMBER
  • 2 POSTS
Thanks for your response, I don't know how to check the output reading for the alternator and what would you consider too low for idling, thanks for your help
Was this
answer
helpful?
Yes
No
-1
Tuesday, May 18th, 2010 AT 5:43 PM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
Place a volt mete r(+) on the alternator output terminal(large terminal) and neg (-) on to battery earth, idle the engine and take a reading you will want about 13.5 V there abouts, what do you have.

Mark
Was this
answer
helpful?
Yes
No
Tuesday, May 18th, 2010 AT 6:04 PM

Please login or register to post a reply.

Related Battery Replace/Remove Content

Battery Replacement
VIDEO
Battery Replacement
Instructional repair video
Battery Replacement
GUIDE
Battery Replacement
Replacing a car battery is easy to do and will take about 20 minutes in most cases, this job can be done using everyday tools. Please wear protective gloves and eyewear when...
VIEW MORE

Sponsored links