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Discussion Starter #1
K.....69 camaro. Fitech feul injection 572 bbc ,aaw wiring harness and tilt wheel with oem steering column .One day i realized that i had a dead battery. Changed it and realized all my gauge lights and my lcd screen for my feul injection were all on with the key off. Fired it up ran fine but went to shut it off and it kept running.disconected the battery....still ran. Had to pull the coil wire off to get it to stop. Anyone got a clue where i should be start?
 

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Are you running a one wire alternator? I had similar problems on my car, I stalled a relay in the circuit from the alternator. That solved the dead battery and not being able to shut it off. Were your gauges and screen lit up with the engine running or with it off? I would take the wire off the alternator and see if the problem goes away.
 

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Discussion Starter #3 (Edited)
I have a three wire 100 amp alt. Disconected it and still couldnt turn the car off. Lights in dash and gauges are on all the time as long as the battery is connected.its like the key never shuts off.
 

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Yes supposed to all shut down completely when key is turned off. But surprisingly my stereo does go off when the key is shut off
 

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It is not likely the tumbler, the switch is down the column from the tumbler activated by a rod. It could be bad or out of adjustment , the stereo working correctly from the key makes me think that your issue is in the power feed or possibly back feeding. Verify that your power source for your ignition, gauges, and screen is controlled by the ignition switch
 

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Wylie, TX - Lee
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Disconnecting the battery while the alternator is turning is a big no no. The alternator will start to generate voltage spikes upwards of 100V and as you discovered it won't turn off the engine anyway because the alternator will keep it alive. That said most modern electronics have protection built in to prevent damage in case this happens so hopefully you did no harm. But even that protection is limited so be careful.

I would look at the ignition switch next as others have stated it may not be working and letting the voltage get through to the ignition wire. With key off probe the ignition switch connector, the red wire is hot, brown wire is ACC, pink is IGN, purple goes to the starter solenoid, and green is ground. The only wire that should have a voltage with key off is the red one. I suspect you will find that the pink and/or brown wire are hot when they should not be. If so then disconnect the connector and probe again.
 

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I don't believe he disconnected the battery while the car was running, He unhooked the alternator and started it to see if it changed anything. Hopefully this is all helpful.
 

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Brett - Leander, Texas 1969 SS396
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K..... Fired it up ran fine but went to shut it off and it kept running.disconected the battery....still ran.
Yes, he did disconnect the battery....

Brett....
 

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Can you reproduce it just going to ignition but not starting the car and then turn it off and remove the key? When you do this do the gauges stay on etc? Has it ever not killed the battery while sitting since putting in the aaw harness? Where did you hook your main aaw feed to?
 
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