Low battery voltage.
Thread Starter
Melting Slicks
Joined: Jan 2007
Posts: 3,333
Likes: 0
From: Athens OH
Low battery voltage.
yeah i searched. the search function sucks now. It used to work well for me. From what I did see from the mousing over the results, my issue is a little different from others.
Anyway, since my modifications(h/c, clutch, procharger and headers) I have been having low voltage readings. It typically shows around 12.5 or so. Occasionally it will creep up to about 13. Intermittently it will drop to about 11.8 for a split second. When it does this I can see the headlights dim, then the voltage sill come back up to 12.5. I am suspicious of the battery for the low voltage, but not sure why the voltage would suddenly drop the way it does if that were the issue. I am about 95% sure I got the grounds all connected. I have not leaned the connections yet.
*EDIT* A few more details. I just checked voltage at the battery while it was running and it was 13.5 while the DIC was reading 12.5. I then checked voltage at the alternator and it was 14.1
*EDIT* With the car NOT running, the DIC reads 11.4, but at the battery, my battery tester reads ~12.5
Any thoughts?
Anyway, since my modifications(h/c, clutch, procharger and headers) I have been having low voltage readings. It typically shows around 12.5 or so. Occasionally it will creep up to about 13. Intermittently it will drop to about 11.8 for a split second. When it does this I can see the headlights dim, then the voltage sill come back up to 12.5. I am suspicious of the battery for the low voltage, but not sure why the voltage would suddenly drop the way it does if that were the issue. I am about 95% sure I got the grounds all connected. I have not leaned the connections yet.
*EDIT* A few more details. I just checked voltage at the battery while it was running and it was 13.5 while the DIC was reading 12.5. I then checked voltage at the alternator and it was 14.1
*EDIT* With the car NOT running, the DIC reads 11.4, but at the battery, my battery tester reads ~12.5
Any thoughts?
Last edited by AMRAAM; Aug 26, 2008 at 02:19 PM.
Pro
Joined: Apr 2006
Posts: 552
Likes: 0
From: Alton Illinois
when you are running, the voltage you are reading is influenced by the alternator. check the battery voltage across the terminals with a voltmeter and the car off. it should be over 12 volts. intermittent operation could be as simple as a poor connection at the post or as extensive as the alternator. autozone can check the battery easy enough, i don't know how good their alternator check is. i would clean and tighten the terminals first, then check the voltage. how old is the battery?
Thread Starter
Melting Slicks
Joined: Jan 2007
Posts: 3,333
Likes: 0
From: Athens OH
Sorry so late getting back. I had a trip to make.
I'll check and clean the terminals in the next couple of days. I also don't have a volt meter with me. I'll have to check it out when i get home as well.
I'll check and clean the terminals in the next couple of days. I also don't have a volt meter with me. I'll have to check it out when i get home as well.
Thread Starter
Melting Slicks
Joined: Jan 2007
Posts: 3,333
Likes: 0
From: Athens OH
I finally got a few minutes to check things out. I just checked voltage at the battery while it was running and it was 13.5 while the DIC was reading 12.5. I then checked voltage at the alternator and it was 14.1
( I added this info to the first post)
( I added this info to the first post)
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
for better search results next time, go to Google and type the following site:corvetteforum.com search text here
It will use google to search the corvetteforum instead of the internal engine.
Next, what you're looking for is on this same page. Choreo has been dealing with this for a while. This will include 116 replys and schematics.
http://forums.corvetteforum.com/show...2075767&page=6
It will use google to search the corvetteforum instead of the internal engine.
Next, what you're looking for is on this same page. Choreo has been dealing with this for a while. This will include 116 replys and schematics.
http://forums.corvetteforum.com/show...2075767&page=6
Thread Starter
Melting Slicks
Joined: Jan 2007
Posts: 3,333
Likes: 0
From: Athens OH
for better search results next time, go to Google and type the following site:corvetteforum.com search text here
It will use google to search the corvetteforum instead of the internal engine.
Next, what you're looking for is on this same page. Choreo has been dealing with this for a while. This will include 116 replys and schematics.
http://forums.corvetteforum.com/show...2075767&page=6
It will use google to search the corvetteforum instead of the internal engine.
Next, what you're looking for is on this same page. Choreo has been dealing with this for a while. This will include 116 replys and schematics.
http://forums.corvetteforum.com/show...2075767&page=6
I have used the google method of searching. I didn't think to use it for this issue though.
Thanks.
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Melting Slicks
Joined: Oct 2001
Posts: 2,320
Likes: 2
From: Salem Oregon
When was the last time you cleaned the ground connections. I sorta had this same problem, but it went away when I cleaned some ground contacts.
Not saying this is your problem, but that it helped me.
Randy
Not saying this is your problem, but that it helped me.
Randy
Thread Starter
Melting Slicks
Joined: Jan 2007
Posts: 3,333
Likes: 0
From: Athens OH
Thanks for the advice
