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No crank, no start.

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Old Jul 13, 2025 | 08:40 PM
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Default No crank, no start.

2011 GS, auto. Gages sweep, all interior lights work. Has new ignition switch and starter. Battery is good and kept on a tender. Will not crank. Any ideas? Thank you!
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Old Jul 13, 2025 | 09:23 PM
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Do you hear the starter solenoid click or no ??…could be high resistance in the starting circuit…do you have a test light and a DVOM ??…don’t know if you are going to try to diagnose this yourself or not.
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Old Jul 13, 2025 | 09:51 PM
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Originally Posted by C5 Diag
Do you hear the starter solenoid click or no ??…could be high resistance in the starting circuit…do you have a test light and a DVOM ??…don’t know if you are going to try to diagnose this yourself or not.
This is my dad’s car. He said he doesn’t hear the solenoid click. Please explain the high resistance. He has a test light and volt meter.
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Old Jul 13, 2025 | 10:06 PM
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Best to Google about the resistance…have him connect his test light to battery negative and and probe the engine block with the test light while attempting to start the car…if the test light illuminates you have a bad block ground…may be best to take the car to an auto electrical specialist instead of throwing more parts at it…how do you know the battery is good…was it load tested ??
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Old Jul 14, 2025 | 02:59 PM
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This may not be any help. This past Saturday I was troubleshooting my cousin's C6, it wouldn't' start after he backed into a trailer in his garage. Long story short the shift cable bushing decided to give up at that exact moment and the car was still in gear and we didn't know it. Took hours of trouble shooting to figure that out.
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Old Jul 14, 2025 | 05:04 PM
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He is checking with a test light and getting the battery checked today. Thanks for the help.
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