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Old 04-05-2021, 07:02 PM   #1
Lefthander1930
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Question Charging 6 volt Battery

Any special instructions when going to charge a 6 volt Pos ground Battery while in the car ??
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Old 04-05-2021, 07:19 PM   #2
rotorwrench
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Default Re: Charging 6 volt Battery

Like anything with the old cars and unknown modifications, it depends on what the car has for a charging system. If the car has an original type generator and cut out relay or an alternator conversion then a person can connect and charge the battery as long as they have a 6-volt charger. If the car has a fun projects regulator on top of the generator then the ground lead should be disconnected from the battery for charging. Just be sure to get a good reconnect before starting the engine. The Fun Projects set up is sentitive to bad connections of either power or ground.
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Old 04-05-2021, 08:10 PM   #3
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Default Re: Charging 6 volt Battery

Here goes, I likely have done it wrong for 25 years but I put the 6 volt negative charger cable on the starter and the 6 volt positive cable on the head bolt. It’s never failed me. Wayne
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Old 04-05-2021, 09:14 PM   #4
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Default Re: Charging 6 volt Battery

Quote:
Originally Posted by McMimmcs View Post
Here goes, I likely have done it wrong for 25 years but I put the 6 volt negative charger cable on the starter and the 6 volt positive cable on the head bolt. Itís never failed me. Wayne
According to the instruction manual for my Schumacher maintainer, that is the correct way to charge a battery in a negative ground car. I didnít realize that until I read the manual recently.

Of course Iíve been doing it wrong on my Model A for the last 7 years with my a Battery Tender (BT), but it seems to work. The BT is electronic so maybe it can adjust to the polarity. The BT only provides 2 amps of output so it could be that it is not enough current to damage the battery.

David Serrano
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Old 04-05-2021, 09:23 PM   #5
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Default Re: Charging 6 volt Battery

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Originally Posted by California Travieso View Post
According to the instruction manual for my Schumacher maintainer, that is the correct way to charge a battery in a negative ground car. I didnít realize that until I read the manual recently.

Of course Iíve been doing it wrong on my Model A for the last 7 years with my a Battery Tender (BT), but it seems to work. The BT is electronic so maybe it can adjust to the polarity. The BT only provides 2 amps of output so it could be that it is not enough current to damage the battery.

David Serrano
I suspect you have confused your positive and negatives. A 6v Model A is positive earth so you would connect the positive lead to earth, not the negative one. The sparks that will result in doing it that way should alert you to the problem.
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Old 04-05-2021, 11:29 PM   #6
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Default Re: Charging 6 volt Battery

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I suspect you have confused your positive and negatives. A 6v Model A is positive earth so you would connect the positive lead to earth, not the negative one. The sparks that will result in doing it that way should alert you to the problem.
Not to mention the LEDs on a Battery Tender blink RED if connected incorrectly.
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Old 04-06-2021, 08:15 AM   #7
Patrick L.
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Default Re: Charging 6 volt Battery

" The sparks that will result in doing it that way should alert you to the problem. "



LOL !
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Old 04-06-2021, 09:18 AM   #8
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Default Re: Charging 6 volt Battery

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Originally Posted by McMimmcs View Post
Here goes, I likely have done it wrong for 25 years but I put the 6 volt negative charger cable on the starter and the 6 volt positive cable on the head bolt. Itís never failed me. Wayne


I have been doing it this way since 1963 with both the original generators and 6V alternators using 6V chargers and battery tenders. No problems.
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Old 04-06-2021, 10:36 AM   #9
Patrick L.
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Default Re: Charging 6 volt Battery

I just use a quick connector with + to grd and - to starter. So I just plug the connector together and walk away.
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Old 04-06-2021, 07:25 PM   #10
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Default Re: Charging 6 volt Battery

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I just use a quick connector with + to grd and - to starter. So I just plug the connector together and walk away.

Same here.


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Old 04-06-2021, 09:55 PM   #11
Hitman
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Default Re: Charging 6 volt Battery

I charge the battery in the car, no matter how the battery is connected. I don’t charge the car.

Positive terminal to the positive battery terminal, negative to negative.
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Old 04-06-2021, 10:24 PM   #12
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Default Re: Charging 6 volt Battery

Simple and true
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Old 04-06-2021, 11:42 PM   #13
Chuck Sea/Tac
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Default Re: Charging 6 volt Battery

[QUOTE=rotorwrench If the car has a fun projects regulator on top of the generator then the ground lead should be disconnected from the battery for charging. Just be sure to get a good reconnect before starting the engine. The Fun Projects set up is sentitive to bad connections of either power or ground.[/QUOTE]

Is this info in the paperwork included when you buy a fun projects?
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Old 04-07-2021, 12:03 AM   #14
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Default Re: Charging 6 volt Battery

Originally Posted by McMimmcs View Post
Here goes, I likely have done it wrong for 25 years but I put the 6 volt negative charger cable on the starter and the 6 volt positive cable on the head bolt. It’s never failed me. Wayne


I have been doing it this way since 1963 with both the original generators and 6V alternators using 6V chargers and battery tenders. No problems.

That's right, For a positive earth system, negative goes to the battery neg and positive to earth (Head nut)
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