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c6 won't start

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Old Jun 20, 2024 | 09:03 PM
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Default c6 won't start

I have a 2005 C6 that won't start. It starts the start sequence normally but when I push the start button the screen goes blank. Any help would be appreciated because I just bought the car in january this year.
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Old Jun 20, 2024 | 09:31 PM
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The FIRST thing you want to check for any starting issue is the battery…I’d take it out and have it load tested at your friendly auto parts store…is this something you are going to diagnose yourself ???
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Old Jun 21, 2024 | 11:28 AM
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Default 2005 Factory Service Manual

Originally Posted by Barron Thompson
I have a 2005 C6 that won't start. It starts the start sequence normally but when I push the start button the screen goes blank. Any help would be appreciated because I just bought the car in january this year.
Tried to send you a PM, but you apparently have the PM block on. If you're interested, I have for sale the 2-volume factory service manual. Everything you need to know on the care, maintenance & repair of the '05.
Both volumes in perfect condition...no rips, tears or missing pages. Asking $240 or make offer. Check out my posting in the C6 Parts for Sale section... https://www.corvetteforum.com/forums...highlight=2005
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Old Jun 21, 2024 | 11:52 AM
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Yes I'm going to diagnose it myself. I'm 82 yrs old but I feel good and have lots of experience with corvettes in the past.
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Old Jun 21, 2024 | 11:59 AM
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I'm sorry. I just joined and haven't gotten my act together yet. I'm not interested right now, but thanks.
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Old Jun 21, 2024 | 12:06 PM
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Originally Posted by Barron Thompson
Yes I'm going to diagnose it myself. I'm 82 yrs old but I feel good and have lots of experience with corvettes in the past.
I’d start with your battery and go from there…you may have to get underneath the car also and do some checks…do you have at least a DVOM and a 12 volt test light and know how to use them ??…unfortunately issues like this aren’t something simple like a blown fuse that is easily replaceable.
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Old Jun 21, 2024 | 12:15 PM
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Yes I was an elevator service tech. and route man.
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Old Jun 21, 2024 | 12:46 PM
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The C6 like there C5 forefathers, do not like it when the Battery Voltage is not in the range they prefer and will do all sorts of weird stuff when that happens,
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Old Jun 21, 2024 | 01:57 PM
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Originally Posted by Z51-R
The C6 like there C5 forefathers, do not like it when the Battery Voltage is not in the range they prefer and will do all sorts of weird stuff when that happens,
I believe that. Makes me long for my 64&82 vettes.
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Old Jun 22, 2024 | 10:33 AM
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Definitely start with checking battery but as an anecdote, I have this happen in the past with a mustang.

identical - I had a corroded ground cable off of the battery that just could no longer supply enough juice to run the starter so it all went dark when I tried.

loose battery terminals or cable connections (at the starter or grounds) could also cause it.

I would do a quick cursory look at a few things and then have the battery tested.
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Old Jun 22, 2024 | 11:36 AM
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Originally Posted by Barron Thompson
Makes me long for my 64&82 vettes.
Yeah, my '62 was tolerant of low battery too. On the other hand, you had to set the distributor points with a feeler gauge every 1000 miles.
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Old Jun 25, 2024 | 05:29 PM
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I had the battery tested and it was good. I'm waiting for my pucks to come in so I can jack the car up and check the starter.
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Old Jun 25, 2024 | 05:48 PM
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A quick test to see if is a bad block ground is if you have a 12 volt test connect it to battery negative and probe a clean spot on the engine block…test light should NOT light when attempting to crank…if it does and you have a pair of heavy duty jumper cables connect one to battery negative and other to a clean spot on engine block..see if the car starts…to check positive side of charging system connect one lead of voltmeter on battery positive post and other lead on the starter solenoid STUD where positive battery cable attaches to…attempt to start the car…you should see less than 0.5 volts on voltmeter.

Last edited by C5 Diag; Jun 25, 2024 at 06:37 PM.
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Old Jun 25, 2024 | 06:09 PM
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A quick check of starter function is remove relay 43…crank relay…jump the 2 load side terminals 30 and 87 (both terminals illustrated below)…if starter if good the engine will just CRANK !!








Last edited by C5 Diag; Jun 26, 2024 at 06:51 AM.
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Old Jun 25, 2024 | 06:24 PM
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When test light connected to ground the test light should illuminate when probing this terminal (control side feed ) if clutch switch or Park/Neutral is good…terminal is rear closest to fender.


Last edited by C5 Diag; Jun 25, 2024 at 06:39 PM.
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