C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old Sep 29, 2016 | 07:10 PM
  #1  
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Default no power?

i completed engine /trans rebuild and install. did a short test drive, came back made some adjustments. the did another short test drive. after returning i shut it off. now no power. with the key off i have power to the alternator and starter, but when i turn key to run, i lose power to those also. i have power to the left side of the fuse box. none on the right side. no gauges, no lights, no radio
i checked the fusible link near the starter. it had power to both sides(with the key off) what am i missing?
72 350
thanks
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Old Sep 29, 2016 | 07:18 PM
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Does the starter crank the engine?
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Old Sep 29, 2016 | 07:38 PM
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No, the starter doesn't even try, no headlights. I did replace starter thinking it may be shorted out. I'm confused on the power going away on the alternator when key is turned to run.
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Old Sep 29, 2016 | 08:10 PM
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Start with the basics. Check battery terminals and terminal ends to make sure you have good connections (Positive and ground). Sounds like you might have a bad connection somewhere. Its very common with cheap battery terminals

Last edited by 76Rat; Sep 29, 2016 at 08:11 PM. Reason: spelling
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Old Sep 30, 2016 | 06:59 AM
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thanks 76Rat and BlackC3vette, I kept checking all the connections and eventually found that the last 5 inches of the battery ground cable where it connects to the frame had corroded within the housing. I replaced the ground cable and everything works great.
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Old Sep 30, 2016 | 12:49 PM
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Originally Posted by olelucky@aol.com
thanks 76Rat and BlackC3vette, I kept checking all the connections and eventually found that the last 5 inches of the battery ground cable where it connects to the frame had corroded within the housing. I replaced the ground cable and everything works great.
It's great to see you found the problem. I was going to suggest a voltage drop test on the cables, but you found what I suspected. Good diagnostic work!
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