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1968 ignition switch

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Old Feb 17, 2024 | 09:09 PM
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Default 1968 ignition switch

Does the ignition switch on the 68 vette have an accessory terminal? I replaced the switch and the wiring harness with factory replacements. The radio works with the ignition switch in the "on" position. Is there an accessory position so the radio can run without the rest of the electrical system connected? I have an electric fuel pump installed and don't want it running just so I can play the radio. I have the large wiring diagram from classiccarwiring.com and it does not show the radio on the diagram.
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Old Feb 18, 2024 | 05:38 AM
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Have you tried turning the switch left from the off position?
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Old Feb 18, 2024 | 11:11 AM
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Same answer in the other post..If the wiring was put back to stock and the switch is a good switch, it should work

FYI GM and all auto makers did this back in the day to avoid burning up your points...the foreign cars had it as the first position to the right before run and start...
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Old Feb 18, 2024 | 02:32 PM
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Well, this morning I had the same thought. The old ignition switch I took off the car did not have the ability to turn to the left...counter clockwise. So........I went to my Vette and grasped the key and voila! it turns left. Of course, the battery is dead from sitting for months, so I have it on the charger to see if the radio works in the accessory position on the ignition switch. I am glad I posted here to let a lot of people know I'm well-educated, but kinda dumb.
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Old Feb 19, 2024 | 07:06 PM
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Ignorance isn't the same a being "dumb". Ignorance just means that you didn't know. Now you do. Welcome to the "club"....
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Old Feb 20, 2024 | 11:34 AM
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Now that I know that I had an accessory position on the ignition switch all along, I still have the problem of the after-market electric fuel pump I installed running when the key is in the "on" position but the engine is not actually running. It also runs with the key in the "accessory" position, so I still can't listen to the radio without the fuel pump and other electrical components fired up. I can't find a place to connect the fuel pump that is hot when the key is in the on position , but not also hot with the key in the accessory position. My wiring diagram is no help. Any suggestions?
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Old Feb 20, 2024 | 01:23 PM
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Originally Posted by rjarndt
Now that I know that I had an accessory position on the ignition switch all along, I still have the problem of the after-market electric fuel pump I installed running when the key is in the "on" position but the engine is not actually running. It also runs with the key in the "accessory" position, so I still can't listen to the radio without the fuel pump and other electrical components fired up. I can't find a place to connect the fuel pump that is hot when the key is in the on position , but not also hot with the key in the accessory position. My wiring diagram is no help. Any suggestions?
I put a switch on the fuel pump relay signal side so I could turn it on and off without the engine running. I use it for testing a lot. I can crank the motor without worry of fuel flowing
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Old Feb 20, 2024 | 03:55 PM
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been a while but fuse block has acc pin
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Old Feb 20, 2024 | 05:19 PM
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the acc pin has power when the switch is in Acc or in run...wouldnt help with the fuel pump, the bottom one is IGn for ignition, that may only have power in run...
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Old Feb 20, 2024 | 05:26 PM
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THe Acc fuse tap has power when the key is in ACC or Run but not while cranking so you dont want to use that for a fuel pump. I believe the IGn which is th eignition position ponly has power in the Run and Start positions so that would be a better location to tap for a fuel pump
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Old Feb 20, 2024 | 05:35 PM
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he wants radio
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Old Feb 20, 2024 | 07:43 PM
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He already has that, he switched the conversation over to his fuel pump in post #6
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Old Feb 20, 2024 | 09:33 PM
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Thanks for the suggestions. I had to add the electric fuel pump a couple years ago. When the engine was up to operating temperature and then shut off, the heat from the engine block evaporated the fuel in the carburetor so I had to crank the starter about 30 seconds to get fuel back in the carb so it would start. With the electric pump I let it run about ten seconds and then there is enough fuel to start the engine. I'll see if using the ign circuit to power the fuel pump lets me listen to the radio in acc without the fuel pump running.
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Old Feb 25, 2024 | 09:22 AM
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Check the wiring diagram down the page on this link, good safety feature too.
https://www.jalopyjournal.com/forum/...-help.1112142/
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