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Voltage drop

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.

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Wednesday, August 29th, 2018 AT 4:03 PM

5 Replies

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

VICKYCAR

MEMBER
2 POSTS

Hardly cranking.

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Thursday, August 30th, 2018 AT 2:32 AM

KEN L

MASTER CERTIFIED MECHANIC
42,895 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

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

KEN L

MASTER CERTIFIED MECHANIC
42,895 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