Alternator,or Battery ??

Reply

  #1  
Old 11-12-06, 09:14 AM
daswede's Avatar
Member
Thread Starter
Join Date: Jul 2003
Location: massachusetts
Posts: 2,215
Alternator,or Battery ??

My car hasn't been starting as briskly as has been a week
ago.
I measured the battery at 12.30 vdc,then started the car and read again at 12,80 vdc. The battery is 9 years old and the battery charge "eye" is red.
I think its time for a new battery and was looking for a agreement from the experts here.
Thanks
 
Sponsored Links
  #2  
Old 11-12-06, 09:48 AM
Join Date: Nov 2006
Posts: 16
Battery or Alternator

Originally Posted by daswede
My car hasn't been starting as briskly as has been a week
ago.
I measured the battery at 12.30 vdc,then started the car and read again at 12,80 vdc. The battery is 9 years old and the battery charge "eye" is red.
I think its time for a new battery and was looking for a agreement from the experts here.
Thanks
It sounds like your battery.You cant go solely by the eye color. An old backyard mechanics way of testing the alternator is,while the car is running,disconnect the positive battery cable.
If the car dies,its your alternator. If it dosnt die,its the battery.
The age of your battery,says it's time to replace it.
 
  #3  
Old 11-12-06, 09:55 AM
daswede's Avatar
Member
Thread Starter
Join Date: Jul 2003
Location: massachusetts
Posts: 2,215
Thanks Jack. I thought so to.
Thats a new one on me,as a old time Doityourselfer,disconnecting the + cable.
Thanks again
daswede
 
  #4  
Old 11-12-06, 10:00 AM
Member
Join Date: Nov 2001
Location: North Texas
Posts: 2,345
warning

Warning by removing battery cable on newer cars with computer controls you can cause damage this being said 9 years is way past due for a battery replament.I assume the old one is a Delco.
If you relly want to check alternator output use a meter.
 
  #5  
Old 11-12-06, 11:24 AM
New guy's Avatar
Member
Join Date: Feb 2005
Posts: 435
Originally Posted by michael van
Warning by removing battery cable on newer cars with computer controls you can cause damage this being said 9 years is way past due for a battery replament.I assume the old one is a Delco.
If you relly want to check alternator output use a meter.
+ + + double warning, do not disconnect the battery while engine is running on newer models.

The way Jack mentioned as he's stated that "old backyard mechanic is = old fashion way" and it's not appliable to the newer model years.

If your Battery voltage is 12.30 when engine off and 12.80 when it's running(suppose to be 13.8 - 14.2), I'd say your Alternator is getting tired and it's about to goes south for it retirement. Do a load test on the Alternator and see if it's pass (probably not).
 
  #6  
Old 11-12-06, 12:07 PM
daswede's Avatar
Member
Thread Starter
Join Date: Jul 2003
Location: massachusetts
Posts: 2,215
The car is a 98' taurus. I guess i'll have it checked out by a mechanic. i don't want any unnessary trouble or expense right now.
 
  #7  
Old 11-12-06, 01:25 PM
Member
Join Date: Nov 2001
Location: North Texas
Posts: 2,345
new battery

Just get a new battery 9 years is twice the life expectancy of the thing.
Or if you want hold on to the old 9 year old battery and hope that it does not die at a bad time like in the middle of a rain storm or on the way to a place you need to be on time.
It is going to happen soon I promise you that.Clean the cables while you are at it.
 
  #8  
Old 11-12-06, 04:31 PM
daswede's Avatar
Member
Thread Starter
Join Date: Jul 2003
Location: massachusetts
Posts: 2,215
I'm getting a new battery. Can't complain about the one in the car now,and as you have stated,it will not start at crucial time
kinda like "murphy''s law".
Already cleaned the terminals.
 
  #9  
Old 11-13-06, 11:30 PM
Member
Join Date: Feb 2006
Posts: 361
Smile

Originally Posted by daswede
I'm getting a new battery. Can't complain about the one in the car now,and as you have stated,it will not start at crucial time
kinda like "murphy''s law".
Already cleaned the terminals.
Try battery first then check alternator, If motor is 3ltr over head cam best to let grage do it as they are a pain. But if you are going to do it yourself remove pully and drop down near lower frame. install the same way. I did this on a 97sable twin over head cam.
 
  #10  
Old 11-14-06, 04:31 AM
daswede's Avatar
Member
Thread Starter
Join Date: Jul 2003
Location: massachusetts
Posts: 2,215
Well,as luck would have it,the car wouldn't start yesterday in the rain.(murphy's law).
The rain let up long enough to remove and replace the battery.
Its charging fine,Whew!!
98' taurus, DOHC, 3.0 liter
Thanks to all.
 
  #11  
Old 11-14-06, 06:23 AM
Member
Join Date: Nov 2001
Location: North Texas
Posts: 2,345
good deal

Glad that all is good now too bad it died out in the rain but a 9 year old battery is just inviting murphys law, now at least you have piece of mind that your battery is good.
I as a rule replace mine every 4 years if it needs it or not. I did have a Optima battery once that I did not replace but after 6 years sold the truck with it in it still.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes