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OH NO!! Need some help guys

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Old Feb 22, 2008 | 04:20 PM
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Default OH NO!! Need some help guys

Ive got a 05 M6.

Thought today my battery was dead. I was dead wrong. Charged it 100%.

When I push the button to start her, she doesn't crank over.

Its acting exactly like if you don't push in the clutch and try to start it.

Anybody know whats going on?

Thanks
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Old Feb 22, 2008 | 04:27 PM
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My guess is the switch isn't making/breaking contact when you do push the clutch in. Don't have a manual but you might look down there and see if the switch is faulty.
Good luck
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Old Feb 22, 2008 | 05:14 PM
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You have lights and eveything? Battery could be bad and supposedly charged. It is a almost 3 years old. No surprise to some if you needed a new one.
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Old Feb 22, 2008 | 05:17 PM
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It could be the safety switch on the clutch. Quick test try pumping the clutch up and down when you push the start button. Keep it low to the floor and move it a bit up and down.
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Old Feb 22, 2008 | 05:26 PM
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This same thing happend to my 03 Z06. The battery was fine. I figured it was the switch behind the clutch. I took the switch out, and jumped it out. It still didnt do anything. Then later it started fine. It did it for a few days. Then I traded it in. If you find out whats wrong with it, please let me know. Also, instead of trying to jump the switch out. Put the car in neutral,with the E brake on. Get on your knees and push the switch in by hand and try to start the car.
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Old Feb 22, 2008 | 06:38 PM
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Does the acc part of the switch work?
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Old Feb 22, 2008 | 07:12 PM
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Originally Posted by timd38
Does the acc part of the switch work?
The acc part of the switch works fine.

After doing a thread search, I PM'd someone here that posted a thread describing the exact same problem I'm having a couple of weeks ago.

My only guess is that it could be the "clutch starter interlock switch". It would be an ez fix I hope. If not, then the flat bed has to come pick her up. That wouldn't be good.

Looking at the lobe part of the switch, it does exhibit alot of wear though.

I'm still all ears my friends, Thanks
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Old Feb 22, 2008 | 07:58 PM
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You should be able to remove the switch, pull out the two wires and put a jumper wire between them. If it doesnt start then, then it's not the switch.
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Old Feb 22, 2008 | 08:50 PM
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Originally Posted by UmCanesZ06
You should be able to remove the switch, pull out the two wires and put a jumper wire between them. If it doesnt start then, then it's not the switch.
Yep, I worked the switch with her in N and kept pushing the start button. Once I get to the bottom of this I'll let you know just what her issue was. Thanks for you input
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Old Feb 22, 2008 | 08:56 PM
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Put your headlights on and see if they stay bright for a couple of min.
If not, then you have a bad cell in your battery. A bad cell will act like it is charged, but when you put a load on it, it will die quickly.
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Old Feb 22, 2008 | 09:27 PM
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Probably a bad BCM. Happens quite often on these cars. Lost one on my C5: one morning, just wouldn't start.
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Old Feb 22, 2008 | 11:21 PM
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Originally Posted by my2005c6
Yep, I worked the switch with her in N and kept pushing the start button. Once I get to the bottom of this I'll let you know just what her issue was. Thanks for you input

Did you try jumpering the wires as suggested?

Last edited by need-for-speed; Feb 22, 2008 at 11:38 PM.
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Old Feb 23, 2008 | 08:08 AM
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Originally Posted by need-for-speed
Did you try jumpering the wires as suggested?
No actually I didn't. The switch looks worn out and is easy to access to replace. To be honest, I really don't feel comfortable jumping the wires.
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Old Feb 23, 2008 | 08:10 AM
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Originally Posted by TTRotary
Probably a bad BCM. Happens quite often on these cars. Lost one on my C5: one morning, just wouldn't start.
Whats a BCM ?
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Old Feb 23, 2008 | 08:11 AM
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Originally Posted by TXSTICK
Put your headlights on and see if they stay bright for a couple of min.
If not, then you have a bad cell in your battery. A bad cell will act like it is charged, but when you put a load on it, it will die quickly.
I'm going to try this right now. Thanks
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Old Feb 23, 2008 | 08:19 AM
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Originally Posted by my2005c6
Whats a BCM ?
BCM is the body control module. Corvettes use CAN bus and most of the electrical is run through several different modules on the car that turn stuff on and off.
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Old Feb 23, 2008 | 08:36 AM
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Originally Posted by timd38
BCM is the body control module. Corvettes use CAN bus and most of the electrical is run through several different modules on the car that turn stuff on and off.
Thanks
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Old Feb 23, 2008 | 08:42 AM
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Originally Posted by TXSTICK
Put your headlights on and see if they stay bright for a couple of min.
If not, then you have a bad cell in your battery. A bad cell will act like it is charged, but when you put a load on it, it will die quickly.
Well I turned and left the lights on for about 5 mins. Didnt really notice a drop in brightness. However, after turning them off, I checked the battery with a tester to fined it a 30% and the volts at 11.

Maybe its just time to replace the battery. I wouldn't think that the battery that I charged yesterday to 100% would be this morning at 30% with just leaving the lights on for 5 mins.

What do you think guys? Sound like its just time to replace the Battery?

Thanks
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Old Feb 23, 2008 | 09:07 AM
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Originally Posted by my2005c6
Well I turned and left the lights on for about 5 mins. Didnt really notice a drop in brightness. However, after turning them off, I checked the battery with a tester to fined it a 30% and the volts at 11.

Maybe its just time to replace the battery. I wouldn't think that the battery that I charged yesterday to 100% would be this morning at 30% with just leaving the lights on for 5 mins.

What do you think guys? Sound like its just time to replace the Battery?

Thanks
You may find this hard to beleive, but you live AL and heat is the worst thing that can happen to a battery. I think it is warmer in AL than MI. I work for a battery manufacturer and batteries die really fast in FL AZ and other high heat states. I am sure that there are people that are going to say that they have had the same battery for 12 years in FL, but I am talking about averages.
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Old Feb 23, 2008 | 09:35 AM
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I seem to recall the C5 had 2 switches coming off the the clutch - one for start lock and the other for another purpose. One was mounted high up on the assembly. Maybe someone can check a shop manual.
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