battery light back with new alternator - Toyota Nation Forum : Toyota Car and Truck Forums
9th Gen Corolla/1st Gen Matrix (2003-2008) 9th generation Corolla and 1st generation Matrix discussion.

 
LinkBack Thread Tools Display Modes
#1 Old 12-04-2013, 08:03 PM
New TN User
 
Join Date: Dec 2013
Location: new york
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
iTrader Score: 0 reviews
(Thread Starter)
battery light back with new alternator

I have a 03 Corolla LE with an auto trans. The battery light came on, sometimes it would stay on and other times it would flash or go out for a time. I hooked up a volt meter for a few day and found out that the alternator was over charging, it would run from 15 to as high as 17 volts.
I put on a new alternator last week and the light was off for a few days, then it came back on and stayed on for the last 3 days. I put the meter back on it for the past few days and the alternator seems to be working perfectly, from just under 14 volts to about 14.5 at all times.
The only other strange thing that's been going on is the daytime running lights haven't been coming on. Could the relay for the lights be causing this? Thanks for any help.
sparkie561 is offline  
Sponsored Links
Advertisement
 
#2 Old 12-04-2013, 08:10 PM
Got Pyro?
 
funman1's Avatar
 
Join Date: Jun 2012
Location: Roseville, CA
Posts: 2,972
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Thanks: 196
Thanked 259 Times in 229 Posts
iTrader Score: 0 reviews
I wonder if the over voltage fried some electronics?

-


Professional Pyro..
No really; I get paid to blow stuff up...
funman1 is offline  
#3 Old 12-05-2013, 05:29 AM
New TN User
 
Join Date: Dec 2013
Location: new york
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
iTrader Score: 0 reviews
(Thread Starter)
thanks
sparkie561 is offline  
#4 Old 12-05-2013, 07:38 AM
Official TN Member
 
Join Date: May 2011
Location: St. Louis-MO
Posts: 366
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Thanks: 17
Thanked 27 Times in 25 Posts
iTrader Score: 0 reviews
most replacement alternators are rebuilt and it's pretty common to get a bad one. I'd take it back

Last edited by GREENPUS; 12-05-2013 at 07:42 AM.
GREENPUS is offline  
#5 Old 12-05-2013, 10:47 AM
New TN User
 
Join Date: Dec 2013
Location: new york
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
iTrader Score: 0 reviews
(Thread Starter)
not rebuilt

It's new, not a rebuilt and the voltage output has been perfect. Why would you think that it's defective?
sparkie561 is offline  
#6 Old 12-05-2013, 02:13 PM
New TN User
 
Join Date: Dec 2013
Location: new york
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
iTrader Score: 0 reviews
(Thread Starter)
update, went crazy again

I just got into my car to go into town. Right after I started it up I noticed the battery light was off and the daytime running headlights came on. Then I looked down at my meter and the voltage went up to 18 volts, the light flashed a couple of times then stayed on again. By the time I got back the voltage was normal and the light was on. I'm going to take it in to Advance auto parts (where I bought the alternator) and let them test it. I don't know if they will be able to find anything unless its acting up at the time.
sparkie561 is offline  
#7 Old 12-05-2013, 02:19 PM
Official TN Member
 
Join Date: Jun 2010
Location: Michigan
Posts: 106
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 23
Thanked 11 Times in 10 Posts
iTrader Score: 0 reviews
How old is the battery? Has it been tested?

thatoneguy is offline  
#8 Old 12-06-2013, 04:23 AM
New TN User
 
Join Date: Dec 2013
Location: new york
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 0
Thanked 0 Times in 0 Posts
iTrader Score: 0 reviews
(Thread Starter)
I'm going to do that. I've had the car 5 years and haven't replaced it yet. I don't know when it was installed.
sparkie561 is offline  
#9 Old 12-06-2013, 06:33 AM
Official TN Member
 
Join Date: Feb 2008
Location: Pa
Posts: 499
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 16
Thanked 34 Times in 34 Posts
iTrader Score: 0 reviews
I have had bad luck in the past with new aftermarket alternators in my former vehicles. I ended up going with a good used one and that cured my issue. Did you use new aftermarket or new OEM unit? Hope this helps.

2005 Corolla LE - AT - 1ZZFE - 118,000 mi
1997 Tacoma - 2WD - 4CYL - 82,000 mi
dorman68 is offline  
The Following User Says Thank You to dorman68 For This Useful Post:
GREENPUS (12-06-2013)
#10 Old 12-06-2013, 08:32 AM
Official TN Member
 
Join Date: May 2011
Location: St. Louis-MO
Posts: 366
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Thanks: 17
Thanked 27 Times in 25 Posts
iTrader Score: 0 reviews
Quote:
Originally Posted by sparkie561 View Post
It's new, not a rebuilt and the voltage output has been perfect. Why would you think that it's defective?
If it's new and an OEM from toyota then I"d think the alternator is good. If it's an aftermarket, then yes, I would not trust it.
GREENPUS is offline  
#11 Old 12-06-2013, 08:34 AM
Official TN Member
 
Join Date: May 2011
Location: St. Louis-MO
Posts: 366
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Thanks: 17
Thanked 27 Times in 25 Posts
iTrader Score: 0 reviews
Quote:
Originally Posted by dorman68 View Post
I have had bad luck in the past with new aftermarket alternators in my former vehicles. I ended up going with a good used one and that cured my issue. Did you use new aftermarket or new OEM unit? Hope this helps.
yup! Most are rebuilt in some 3rd world country and shipped here. Pure garbage...
GREENPUS is offline  
#12 Old 12-06-2013, 10:03 PM
Official TN Member
 
Join Date: Apr 2009
Location: Chicago, IL
Posts: 136
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 2
Thanked 19 Times in 15 Posts
iTrader Score: 0 reviews
Just a thought: are your battery cable connections secure at both ends of each cable? (...and also the larger ground connections such as engine-to-body) If your battery circuit is going open occasionally while driving, the car won't go dead (since you're using on-board power from the alternator), but your voltage regulator might go bonkers (to use the scientific explanation ) trying to deal with a charging circuit of suddenly-infinite resistance.

Andy Green
2005 Corolla S
2005 XLE AWD Limited
acg_sienna is offline  
Sponsored Links
Advertisement
 
Reply

  Toyota Nation Forum : Toyota Car and Truck Forums > Toyota Passenger and Sports Car Forums > Corolla and Matrix Forum > 9th Gen Corolla/1st Gen Matrix (2003-2008)

Bookmarks

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome