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Old May 8, 2016 | 08:24 PM
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Default 78 sarts one time only

Yesterday I moved the car. Had it running maybe 5 minutes then shut it off. It started rignt up without any issues. About a half hour later I went to start it up and it will not crank at all. Lights work, seems to habe power but will not turn. I let it sit overnight and went to start it this afternoon. It started right up. Ran it a few minites and moved it back to its parking spot. I shut it off, waited about two minutes and again, nothing. I cleaned the ground wires, both the one in back and the one near the starter. I cleaned the connections on the starter. Cleaned battery terminals. Checked voltage across battery terminals and have full volts. Tried to start it and nothing. Fuse links seem to be good. My guess is the starter relay is going bad? Any other ideas I should check?
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Old May 8, 2016 | 11:00 PM
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Originally Posted by biackbenz
My guess is the starter relay is going bad? Any other ideas I should check?
I would agree and it would be the first thing I would check. Just so we're on the same sheet of music... this is what we're talking about.


(not a Corvette starter, but similar in function)

I would remove the solenoid from the starter and check inside. If there is evidence of corrosion inside the solenoid and on the bendix plunger, clean it good and reassemble the starter and try it out. (I would also spray some CRC 556 or similar lubricant on the plunger before reassembling the solenoid.) If it fails again when the engine is warm, replace the solenoid with a new one. This should cure the problem.

Good luck and let us know what you discover... GUSTO
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Old May 9, 2016 | 12:47 AM
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Does the 'clutch safety switch' engage properly and pass the voltage?
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Old May 9, 2016 | 12:48 AM
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If you turn the key to crank, and nothing...try getting a helper to tap the solenoid while you turn the key. If it cranks, bad solenoid.

This is after testing the purple wire at the solenoid for voltage while cranking.

The starter must be removed to access the solenoid...
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Old May 9, 2016 | 07:18 AM
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possibly the starter solenoid, but more likely neutral start switch (or other start-interlock switch) in the system.
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Old May 14, 2016 | 09:09 PM
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Thanks for all the suggestions and help. Turns out what really changed is I took it off the battery tender. With some help I measured the voltage drop while starting. It dropped to zero. New battery and all is well.
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