Service charging system error after changing coils
Thread Starter
Drifting
Joined: Apr 2006
Posts: 1,786
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From: New York New York
Checked the under hood fuses. Checked out ok. I’ll check the footwell fuses when it’s not freezing out by me. I’m guessing I’ll get a bit of draw from my M2W which is wired to stay in whatever position I left it and the interior lights that I changed to LEDs. I also just took the fuse out if my aftermarket speakers/amp to check if maybe that was draining the battery overnight. Battery was at 12.50 just now. Left it off the charger. Will check tomorrow and report back.
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Joined: Sep 2013
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From: Cape Coral, Florida
Checked the under hood fuses. Checked out ok. I’ll check the footwell fuses when it’s not freezing out by me. I’m guessing I’ll get a bit of draw from my M2W which is wired to stay in whatever position I left it and the interior lights that I changed to LEDs. I also just took the fuse out if my aftermarket speakers/amp to check if maybe that was draining the battery overnight. Battery was at 12.50 just now. Left it off the charger. Will check tomorrow and report back.
Thread Starter
Drifting
Joined: Apr 2006
Posts: 1,786
Likes: 336
From: New York New York
It possible. They’ve been in there a couple years, though. Hasn’t been an issue till now. I’ll probably switch them out anyway. I’ll let you know what I find.
Thread Starter
Drifting
Joined: Apr 2006
Posts: 1,786
Likes: 336
From: New York New York
Quick update. I swapped out the interior LEDs to auxito error free. That alone was a game changer, no more FOB errors. I also removed a front camera I had installed that had a button with a light that stayed on and I rewired my M2W to zero drain. Seems much better but I’m still sure not its fixed. Last night I shut the car down and it was 12.85. This am it tested at 12.74. Much better and fired right up. What was weird was that i had it on the Ctek charger pretty much all last week. I tested the voltage daily but I didn’t start the car until yesterday. The battery tested at 13.86 on Friday night before I started it on Saturday am. I got a brief service charging system on the DIC which quickly went away. No error when i started it today. Maybe the voltage was too high? It’s much better but I think I’m going to check every relay one by one. How much voltage drop is considered normal overnight if nothing is draining the battery? Thanks for your help
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,631
Likes: 4,076
From: Cape Coral, Florida
Quick update. I swapped out the interior LEDs to auxito error free. That alone was a game changer, no more FOB errors. I also removed a front camera I had installed that had a button with a light that stayed on and I rewired my M2W to zero drain. Seems much better but I’m still sure not its fixed. Last night I shut the car down and it was 12.85. This am it tested at 12.74. Much better and fired right up. What was weird was that i had it on the Ctek charger pretty much all last week. I tested the voltage daily but I didn’t start the car until yesterday. The battery tested at 13.86 on Friday night before I started it on Saturday am. I got a brief service charging system on the DIC which quickly went away. No error when i started it today. Maybe the voltage was too high? It’s much better but I think I’m going to check every relay one by one. How much voltage drop is considered normal overnight if nothing is draining the battery? Thanks for your help
Did you perform a parasitic drain test with your DVOM or check the drain with the AMP setting of your DVOM ??
Thread Starter
Drifting
Joined: Apr 2006
Posts: 1,786
Likes: 336
From: New York New York
I checked the under hood fuses for drain with the dvom and they tested ok. Didn’t do the footwell fuse box yet as I cant figure out the best way the reach down there without opening the door. I changed out what I suspected was causing a parasitic drain.
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Joined: Sep 2013
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From: Cape Coral, Florida
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https://www.corvetteforum.com/forums...error-msg.html
https://www.corvetteforum.com/forums...intenance.html
Pull the door buttons and open them up. If you have corrosion. Then you have corrosion at connectors as well.
https://www.corvetteforum.com/forums...intenance.html
Pull the door buttons and open them up. If you have corrosion. Then you have corrosion at connectors as well.
Thread Starter
Drifting
Joined: Apr 2006
Posts: 1,786
Likes: 336
From: New York New York
Well, I think I might have sorted the issues out. I had a suspicion that my el cheap o alternator was at the very least part of my issue. I found a mechman on here and it cured most of the issue. While I was at it I did a powermaster starter. I’m glad I did, even though the installed kick my butt a bit. Hot start issue seems to be gone. I found one of the studs was a bit loose on the old one. Thanks to everyone for the assistance.
