77' has no electrical power ? - CorvetteForum - Chevrolet Corvette Forum Discussion

C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette

77' has no electrical power ?

Old 10-13-2018, 06:46 PM
CF Senior Member
Thread Starter
Member Since: Oct 2014
Location: Mass
Posts: 192
Thanked 3 Times in 2 Posts
Default 77' has no electrical power ?

i posted this in the general section by mistake. I parked it about two weeks ago with everything working. Put it on the tender. now it has no power at all. the battery reads 12.65. I have no power at any fuse, or the alternator. I put a ground from the frame to the block. I wiggled the wires on the fire wall to the fuse panel. I tried to put it into other gears, it is an auto. Any other tips or advice before i start digging further into it. I did replace the ignition in the column about 6 years ago. Thanks for any advice.
77vette05 is offline  
Old 10-13-2018, 07:42 PM
CF Senior Member
HeadsU.P.'s Avatar
Member Since: Aug 2017
Location: Cool Northern Michigan
Posts: 1,472
Thanked 245 Times in 235 Posts

I still would blame the GRD, or lack of. You said you jumped a wire from frame to block to no avail. Likely, you jumped a wire from a filthy, oily block to a rusty, painted frame to no avail.
99.9% of C3 electrical issues are the grounds, or lack of. Should be two GRD cables. One at the battery box of course and one near the starter, block to frame with excellent clean shiny contact points.

Do you have lights?

Last edited by HeadsU.P.; 10-13-2018 at 07:43 PM.
HeadsU.P. is offline  
Old Yesterday, 04:48 PM
CF Senior Member
marc9889's Avatar
Member Since: Mar 2013
Location: Athens AL
Posts: 140
Thanked 4 Times in 4 Posts

I had the same thing happen with a relatively new AGM battery. The car sat for a few weeks on a tender, then one day I got in, turned the key, and nothing. Not a click, not a buzz, ..nothing. I put a volt meter on the battery and it showed right at 12v. I eventually pulled the battery and took it to Advance Auto Parts (where I bought it) and the battery was bad. Not sure how it shows 12v and is still bad, but that's what they said, and they gave me a brand new one. I put in the new one in the car and haven't had an issue since. Let us know how it works out.
marc9889 is online now  

Thread Tools
Search this Thread
Sponsored Ads
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: