Battery light is on
Le Mans Master
Joined: Jan 2001
Posts: 6,723
Likes: 1,377
take a voltage reading at the battery terminals in the following condiitions:
1. engine off, no loads energized.
2. engine idling, no loads energized.
3. engine idling, max loads energized.
4. Rev engine up to about 1100-1200 rpm and get another reading.
We can then evaluate what is going on.
1. engine off, no loads energized.
2. engine idling, no loads energized.
3. engine idling, max loads energized.
4. Rev engine up to about 1100-1200 rpm and get another reading.
We can then evaluate what is going on.
Thread Starter
Advanced
Joined: May 2010
Posts: 71
Likes: 4
take a voltage reading at the battery terminals in the following condiitions:
1. engine off, no loads energized.
2. engine idling, no loads energized.
3. engine idling, max loads energized.
4. Rev engine up to about 1100-1200 rpm and get another reading.
We can then evaluate what is going on.
1. engine off, no loads energized.
2. engine idling, no loads energized.
3. engine idling, max loads energized.
4. Rev engine up to about 1100-1200 rpm and get another reading.
We can then evaluate what is going on.
14.43 at idle
14.49 at 1500 rpm
Race Director
Joined: May 2006
Posts: 18,703
Likes: 2,572
Thread Starter
Advanced
Joined: May 2010
Posts: 71
Likes: 4
Le Mans Master
Joined: Jan 2001
Posts: 6,723
Likes: 1,377
frankenbro
Here you are-when at idle the voltage at 11.80 - 11.98 with lights, radio, wipers and AC on is LESS adequate---- it is actually downright shitty. At idle your alternator is not adequately charging and the battery is slowly getting drained down.
I recommend not ******* around and just going to a 140 amp CS-144.
Your profile is not filled out but methinks from your avatar that your car is a 1982? Your wiring should be adequate. Lotsa posts on here on how to convert....if you cannot find just ask.
I am in the process of converting my CS-144 to a DR44G....but I have not finished .... but if you wanna try...here is that post I have NOT made much progress on just because......
https://www.corvetteforum.com/forums...xperiment.html
Here you are-when at idle the voltage at 11.80 - 11.98 with lights, radio, wipers and AC on is LESS adequate---- it is actually downright shitty. At idle your alternator is not adequately charging and the battery is slowly getting drained down.
I recommend not ******* around and just going to a 140 amp CS-144.
Your profile is not filled out but methinks from your avatar that your car is a 1982? Your wiring should be adequate. Lotsa posts on here on how to convert....if you cannot find just ask.
I am in the process of converting my CS-144 to a DR44G....but I have not finished .... but if you wanna try...here is that post I have NOT made much progress on just because......
https://www.corvetteforum.com/forums...xperiment.html
Last edited by carriljc; Jul 16, 2024 at 07:11 PM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Thread Starter
Advanced
Joined: May 2010
Posts: 71
Likes: 4
frankenbro
Here you are-when at idle the voltage at 11.80 - 11.98 with lights, radio, wipers and AC on is LESS adequate---- it is actually downright shitty. At idle your alternator is not adequately charging and the battery is slowly getting drained down.
I recommend not ******* around and just going to a 140 amp CS-144.
Your profile is not filled out but methinks from your avatar that your car is a 1982? Your wiring should be adequate. Lotsa posts on here on how to convert....if you cannot find just ask.
I am in the process of converting my CS-144 to a DR44G....but I have not finished .... but if you wanna try...here is that post I have NOT made much progress on just because......
https://www.corvetteforum.com/forums...xperiment.html
Here you are-when at idle the voltage at 11.80 - 11.98 with lights, radio, wipers and AC on is LESS adequate---- it is actually downright shitty. At idle your alternator is not adequately charging and the battery is slowly getting drained down.
I recommend not ******* around and just going to a 140 amp CS-144.
Your profile is not filled out but methinks from your avatar that your car is a 1982? Your wiring should be adequate. Lotsa posts on here on how to convert....if you cannot find just ask.
I am in the process of converting my CS-144 to a DR44G....but I have not finished .... but if you wanna try...here is that post I have NOT made much progress on just because......
https://www.corvetteforum.com/forums...xperiment.html
I charged the battery, now I have
12.75 off
14.42 idle
14.50 at 1500 rpm
12.33 under load
the light is still on.
Race Director
Joined: May 2006
Posts: 18,703
Likes: 2,572
Race Director
Joined: Nov 2006
Posts: 13,193
Likes: 7,793
From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
Your under load voltage is way to low. That's why the light is on. Stator in the alternator is likely breaking down. New alternator.
Race Director
Joined: Nov 2006
Posts: 13,193
Likes: 7,793
From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
How good is that!