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Old May 10, 2020 | 06:53 PM
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Hello all I’m a new member just bought c5 vette
just got issue was running fine started it every 3 days
and took it to get oil changed brake fluids flushed and new fluid
afterward took it for a ride and went home.
this morning I go to start it and won’t start The rear hatch won’t open the windows don’t go down
help a newbie cause I checked fuses inside and outside all fine the fab unlocks the doors but hatch don’t open what should I be looking for. Battery has 12.8 reading
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Old May 10, 2020 | 07:15 PM
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Clean the battery terminals and load test the battery.
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Old May 10, 2020 | 07:19 PM
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Bad ground connections. loose or corroded battery terminals, bad connection to starter or loose
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Old May 10, 2020 | 07:45 PM
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It’s been fine for three weeks just strange I push the button in car to open rear hatch nothing gas door nothing radio nothing and on the key fab only locks and unlocks doors don’t see lights come on when click to lock or unlock the doors and with out tapping key fab and I’m sitting in the car it self unlock or lock didn’t notice which one some kind of freakin gremlin
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Old May 11, 2020 | 03:48 PM
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Originally Posted by Temax
It’s been fine for three weeks just strange I push the button in car to open rear hatch nothing gas door nothing radio nothing and on the key fab only locks and unlocks doors don’t see lights come on when click to lock or unlock the doors and with out tapping key fab and I’m sitting in the car it self unlock or lock didn’t notice which one some kind of freakin gremlin
Did you have the battery tested????
Could be a bad cell.
Good luck
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Old May 11, 2020 | 04:39 PM
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That’s what it was bad battery
but was reading 12.82
changed and it started right up
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Old May 11, 2020 | 06:05 PM
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Well I know first battery was bad now with new battery cleaned post put new battery and starts right up I see it charging about 14.2 I shut car off went back 2 hours later and car won’t start I disconnected the battery and reconnect and car starts up but I keep hearing the horn come on like when you lock the car and I’m not touching key fab
any suggestions???
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Old May 12, 2020 | 01:30 AM
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There have been some batteries which have shallow side terminal bolt holes. If you have one like that, the connection at the battery will look OK, but may not make good contact. You should not be able to move the battery cable at the terminal when the attaching bolt is tightened properly (11 foot pounds for side terminal bolts).

Check the battery negative cable ground connection. Disassemble, clean and coat with dielectric grease. Same with engine to frame ground and all others:

https://www.corvetteforum.com/forums...locations.html
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Old May 12, 2020 | 05:53 AM
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Moved to C5 Tech.
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Old May 14, 2020 | 09:07 AM
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If your battery is good, and all power and ground connections are clean and tight, it might be your BCM. I recall somebody having to disconnect and reconnect the battery to start their car, doing that resets the BCM, the BCM does provide the ground side to the TDR which sends 12volts to the starter solenoid.
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Old May 14, 2020 | 09:29 AM
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Bcm it is the mechanic says he unplug forgot which one he said on bcm and it started right up
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