Strange electrical demons
Thread Starter
Racer
Joined: Dec 2018
Posts: 498
Likes: 211
From: Wisconsin
2023 C6 of the Year Finalist - Unmodified
Strange electrical demons
I would be grateful for any insight anyone has to offer, a ground problem seems most likely but I am open to ideas. I drove from Wi. to Bowling Green Ky. last Thursday for LS fest, About 2 hours to go with the outside temp reading 97 degrees the ac blower just quit. I checked the fuses, they were good and I could hear the compressor clutch engage when I turned the system on so I thought the fan must have failed and I would replace it when I got home. Then on Fri. I was in the auto cross grid waiting for a run when the car would not start. The head lights stayed bright but the dash went blank when the start button was pushed. I tried moving the shifter from neutral to park and back with no difference . A few minutes later the car started like normal . The rest of the week end everyhing seemed normal except the ac fan not working . On Sunday I filled up with gas to start for home and saw that the compas in the mirror was blank and the information center below the gages was also blank. About 2 mile down the road they both came back on and the ac blower started blowing again.The rest of the way home all was normal. Then today when I shut it off it beep and the message "NO FOB RESTART?" was displayed. I tried restarting and it started normally.This is on a 2013 GS.
Last edited by kestell123; Sep 13, 2024 at 08:28 PM.
Thread Starter
Racer
Joined: Dec 2018
Posts: 498
Likes: 211
From: Wisconsin
2023 C6 of the Year Finalist - Unmodified
Since the Blower motor quit after 7 hours of driving with the voltage at near 14 volts the battery causing that seems unlikely. I am going to focus on the grounds ,in particular G202 in the pass foot well. It provides ground for the blower motor processor, inside mirror relay, HVAC control module and body control module among others.
Safety Car
Joined: Sep 2005
Posts: 4,226
Likes: 643
From: Orange County Ca
Thread Starter
Racer
Joined: Dec 2018
Posts: 498
Likes: 211
From: Wisconsin
2023 C6 of the Year Finalist - Unmodified
Well I have new gremlins . No fob detected ,Fob does open door and trunk and sound horn. Car starts with fob in the slot. BCM shows codes U1096, U1153,U1193,U2108 and U1305. I also went into low power mode and had a throttle pedal code set, the car went back to normal after restart.. C5 Diag any help for were to start would be appreciated .
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
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
Instructor
Joined: Dec 2009
Posts: 207
Likes: 47
From: Southern Cali
I would be grateful for any insight anyone has to offer, a ground problem seems most likely but I am open to ideas. I drove from Wi. to Bowling Green Ky. last Thursday for LS fest, About 2 hours to go with the outside temp reading 97 degrees the ac blower just quit. I checked the fuses, they were good and I could hear the compressor clutch engage when I turned the system on so I thought the fan must have failed and I would replace it when I got home. Then on Fri. I was in the auto cross grid waiting for a run when the car would not start. The head lights stayed bright but the dash went blank when the start button was pushed. I tried moving the shifter from neutral to park and back with no difference . A few minutes later the car started like normal . The rest of the week end everyhing seemed normal except the ac fan not working . On Sunday I filled up with gas to start for home and saw that the compas in the mirror was blank and the information center below the gages was also blank. About 2 mile down the road they both came back on and the ac blower started blowing again.The rest of the way home all was normal. Then today when I shut it off it beep and the message "NO FOB RESTART?" was displayed. I tried restarting and it started normally.This is on a 2013 GS.
Thread Starter
Racer
Joined: Dec 2018
Posts: 498
Likes: 211
From: Wisconsin
2023 C6 of the Year Finalist - Unmodified
If it was only a no start this would have merit, combined with the other symptoms it does not seem to fit.
Instructor
Joined: Dec 2009
Posts: 207
Likes: 47
From: Southern Cali
Maybe, but it's simple enough to check under the boot, might be worth your while as you narrow down the list. Your description of the car's symptoms reminded me of the same, it took me about a few months before the car became a paper weight in my garage. When the linkage is loose, it will cause all kinds of chaos.
Thread Starter
Racer
Joined: Dec 2018
Posts: 498
Likes: 211
From: Wisconsin
2023 C6 of the Year Finalist - Unmodified
I pulled and inspected the BCM connectors. I did not see any obvious problems, so I sprayed them down with electrical contact cleaner and reassembled. As of now everything is working. If the Gremlin reoccur, I will update.