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Positive ground
Just can't stay away
Joined:
2017/9/29 18:30
From Babylon NY
Posts: 51
The negative battery cable from my battery is bolted right to my engine block does this indicate negative ground? If it is positive ground
Where would the cable from the negative side of the battery attach to
It is a late 55 any possibility it was wired like a 56 because of how late in the production run it was made
#5138
Thanks

Posted on: 7/12 8:28:47
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Re: Positive ground
Forum Ambassador
Joined:
2007/3/14 16:01
From New Jersey
Posts: 15729
Forget about it being a late car and thus wired backwards by the factory, that just didn't happen. As you describe it, your car is currently wired as negative ground, whether done accidently or deliberately as a conversion is not apparent.

Your car should be positive ground, the (+) cable of the battery connected to the engine block (generally one of the bolts holding the oil filter) and the (-) cable to the starter solenoid. There are a host of questions to be asked regardless of whether you keep it as negative ground, or return it to it's correct status. I'm sure others will take you through that process.

Posted on: 7/12 8:39:38
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Re: Positive ground
Home away from home
Joined:
2015/1/16 9:43
From sw, pa
Posts: 953
I didn't know Packard was still using a positive ground on the 1955-56 cars after they switched from 6 volt to 12 volt battery??
John

Posted on: 7/12 9:54:25
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Re: Positive ground
Forum Ambassador
Joined:
2007/4/20 17:54
From Fresno CA
Posts: 15404
Quote:

ptv wrote:
I didn't know Packard was still using a positive ground on the 1955-56 cars after they switched from 6 volt to 12 volt battery??
John


Positive ground thru 55, then Packard joined about everyone else and changed to negative ground for 56.

If the change to negative ground was deliberate the ammeter was probably changed and possibly the coil as well.

If engine is off and you turn the headlights on, if ammeter reads Discharge then it was changed to match the polarity and probably was deliberate. If it reads Charge then maybe an accidental swap or else someone didn't bother with correcting the reading. On a proper swap the coil terminals would also be swapped so in the case of a negative ground the negative coil terminal should go to the distributor.

Posted on: 7/12 10:45:12
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