Voltage drop

Tiny
VICKYCAR
  • MEMBER
  • 1967 OLDSMOBILE 442
  • V8
  • 2WD
  • MANUAL
  • 60,000 MILES
Battery is mounted in trunk with brand new ground wire to frame and new positive to horn relay junction on front inner fender. Battery putting out 11-12 volts when tested to junction only 6 volts going to starter. Good ground strap mounted from front of engine to frame.
Wednesday, August 29th, 2018 AT 4:03 PM

5 Replies

Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I am Danny.
So, is starter not cranking fast enough?
Thanks for using 2CarPros.
Danny-
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Thursday, August 30th, 2018 AT 1:00 AM
Tiny
VICKYCAR
  • MEMBER
  • 2 POSTS
Hardly cranking.
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Thursday, August 30th, 2018 AT 2:32 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
It sounds like you have a positive cable issue what gauge is the cable? Should be a 1 or 2. Can you upload pictures of the battery mounting and cable routing? Cheers, Ken
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Saturday, September 1st, 2018 AT 11:39 AM
Tiny
VICKYCAR
  • MEMBER
  • 2 POSTS
New #1 cables. I believe it is in ignition switch.
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Saturday, September 1st, 2018 AT 1:18 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
It could be. Here is a guide so you can do some testing to see where the voltage drop occurs:

https://www.2carpros.com/articles/how-to-check-wiring

Please let us know what happens.

Cheers, Ken
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Saturday, September 1st, 2018 AT 1:20 PM

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