Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 02-03-2019, 01:21 PM   #1
DelPercio
Junior Member
 
Join Date: Jan 2019
Location: Delaware
Posts: 4
Default Battery in wrong

Hello just received my car yesterday and wanted to charge the battery. When I hooked up the charger I had a bad polarity. I took off the negative strap and the battery's negative terminal is connected and the frame. The positive is hooked to the solid wire that goes to the car. The car starts and the lights work. Shouldn't the positive terminal be hooked to the ground strap.
DelPercio is offline   Reply With Quote
Old 02-03-2019, 01:31 PM   #2
eagle
Senior Member
 
eagle's Avatar
 
Join Date: Aug 2011
Location: Eagle Bend, MN
Posts: 1,370
Default Re: Battery in wrong

If it has been converted to negative ground, then leave it. Quick way is to look at the polarity of the coil.
__________________
"There are some that can destroy an anvil with a teaspoon and shouldn't be allowed to touch anything resembling a tool."
eagle is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 02-03-2019, 02:28 PM   #3
Werner
Senior Member
 
Werner's Avatar
 
Join Date: Jan 2019
Location: Germany, near Aachen
Posts: 190
Default Re: Battery in wrong

Hello,

if the battery poles were actually reversed, then the starter would run backwards. The generator could not charge. I had read that also A Models were built, which had "minus" at the body / frame (grounding current).
__________________
Beste Gruesse aus Deutschland,
Werner


Ford Model A Roadster, 1928
Citroen 11 CV, 1947
Honda CB 450 K 1, 1968
Hercules Wankel Rotary Engine, 1976 (Canadian version)
Werner is online now   Reply With Quote
Old 02-03-2019, 02:33 PM   #4
Bob C
Senior Member
 
Join Date: May 2010
Location: So Cal
Posts: 6,046
Default Re: Battery in wrong

Is it 6 or 12 Volt?


Bob
Bob C is offline   Reply With Quote
Old 02-03-2019, 02:39 PM   #5
Y-Blockhead
Senior Member
 
Y-Blockhead's Avatar
 
Join Date: Jul 2011
Location: Redondo Beach, CA
Posts: 3,707
Default Re: Battery in wrong

Quote:
Originally Posted by Werner View Post
Hello,

if the battery poles were actually reversed, then the starter would run backwards. The generator could not charge.
That is incorrect. The starter does not care about the polarity. My starter ran happily at 12v negative ground for many years. The generator would work fine if you 'polarize' for negative ground.
__________________
Y-Blockhead
'30 Briggs Town Sedan
_________________________________
And once again that is just my 1 worth.
Y-Blockhead is offline   Reply With Quote
Old 02-03-2019, 02:45 PM   #6
DD931
Senior Member
 
DD931's Avatar
 
Join Date: May 2010
Location: PA Poconos
Posts: 628
Default Re: Battery in wrong

Back to the original question. If it's a six volt battery the positive terminal should be connected to ground. If it's 12 volts the negative terminal should be connected to ground.
DD931 is offline   Reply With Quote
Old 02-03-2019, 02:56 PM   #7
Benson
Senior Member
 
Benson's Avatar
 
Join Date: May 2010
Posts: 1,755
Default Re: Battery in wrong

PM sent
__________________
_____________________________________

Last edited by Benson; 02-03-2019 at 05:40 PM.
Benson is offline   Reply With Quote
Old 02-03-2019, 03:08 PM   #8
Gene F
Senior Member
 
Join Date: Mar 2012
Posts: 121
Default Re: Battery in wrong

My grandad had something similar on his 1959 Olds. Battery swap, and the neighbor came over and made himself right at home, and took charge of changing the battery. Car ran fine, except the radio would not work. A little investigation, and it was noticed the battery was hooked up backwards. Swapped it around, and the radio worked.
Gene F is offline   Reply With Quote
Old 02-03-2019, 03:24 PM   #9
redmodelt
Senior Member
 
redmodelt's Avatar
 
Join Date: May 2010
Location: Portland OR
Posts: 4,202
Default Re: Battery in wrong

If every thing is working fine, leave it alone.
__________________
I know the voices aren't real but damn they have some good ideas!
redmodelt is offline   Reply With Quote
Old 02-03-2019, 04:01 PM   #10
DelPercio
Junior Member
 
Join Date: Jan 2019
Location: Delaware
Posts: 4
Default Re: Battery in wrong

The battery is 6 volt 3 cells. When I hooked the smart charger it showed 6.3 volts went into a deep charge for an hour then shut down and said the battery was bad. Is it possible to charge in reverse. I was thinking of turning the battery around with a pos. Th ground turning the lights on to drain it dead then recharging.
DelPercio is offline   Reply With Quote
Old 02-03-2019, 04:28 PM   #11
wmws
Senior Member
 
wmws's Avatar
 
Join Date: Feb 2013
Location: Coatesville, Pa
Posts: 450
Default Re: Battery in wrong

When charging hook up + to + and - to -
wmws is offline   Reply With Quote
Old 02-03-2019, 04:39 PM   #12
Magicbox51
Senior Member
 
Magicbox51's Avatar
 
Join Date: Jun 2017
Location: Walla Walla, WA
Posts: 431
Default Re: Battery in wrong

Whether positive or negative ground, you still want to connect a charger so that positive is to the positive terminal on the battery. Usually a charger has positive on a red connector. Hopefully, your smart charger has a 6-volt setting. Some don't. If do you revert back to a positive ground system, you will need to re-polarize the generator. Assuming you have a generator and not an alternator. If your prior owner has converted it to a negative ground alternator, then you'd better leave the polarity where it is. The starter motor will run the correct direction whether it is positive or negative ground. It seemingly defies logic, but that is the way it is. If it were mine, I would just leave it regardless.
__________________
-Bill G
Magicbox51 is offline   Reply With Quote
Old 02-03-2019, 04:41 PM   #13
DelPercio
Junior Member
 
Join Date: Jan 2019
Location: Delaware
Posts: 4
Default Re: Battery in wrong

Disconnected the ground and it did the same thing. Charged and then said the battery was bad. I'll look to see if the red coil wire goes to the distributor.
DelPercio is offline   Reply With Quote
Old 02-03-2019, 06:59 PM   #14
eagle
Senior Member
 
eagle's Avatar
 
Join Date: Aug 2011
Location: Eagle Bend, MN
Posts: 1,370
Default Re: Battery in wrong

Your getting a bunch of junk info. #1 DETERMINE THE POLARITY THE CAR IS SET UP FOR. From factory the A was positive ground, however lots of people convert them to negative ground. #2 Determine if the battery is charged correct polarity. Yes, it is possible to charge a battery backwards. Use a voltmeter to check, black to - post, red to + post. Do NOT connect battery to car until you know which polarity the car is set up to operate, and if your battery is charged correctly.
#3 does the car have the original generator and cutout? Keep in mind that a regulator can look like a cutout but will NOT put up with reverse polarity. If its the original cutout it will likely be fine.
#4 a good first indicator that the car has been converted to neg ground, is when you honk the horn, the ammeter jogs to the left. Also the coil will have a + sign (or red dot) by one terminal. If it is a negative ground car, that side of the coil should go to battery, positive ground car, the + side of coil will go to points in distributor.
#5 now that you've got the battery charged properly and the polarity of the car determined, now the generator needs to be polarized. Take a piece of wire and momentarily touch both sides of the cutout.
#5 start the car and verify that you get positive charge on ammeter.
__________________
"There are some that can destroy an anvil with a teaspoon and shouldn't be allowed to touch anything resembling a tool."
eagle is offline   Reply With Quote
Old 02-03-2019, 07:57 PM   #15
redmodelt
Senior Member
 
redmodelt's Avatar
 
Join Date: May 2010
Location: Portland OR
Posts: 4,202
Default Re: Battery in wrong

If the car has been converted then things would have been changed at that time. HE DOES not say that he installed the battery, it is the way it came.
__________________
I know the voices aren't real but damn they have some good ideas!
redmodelt is offline   Reply With Quote
Old 02-03-2019, 08:03 PM   #16
Charlie Stephens
Senior Member
 
Join Date: May 2010
Location: Southern California
Posts: 5,821
Default Re: Battery in wrong

Quote:
Originally Posted by DD931 View Post
Back to the original question. If it's a six volt battery the positive terminal should be connected to ground. If it's 12 volts the negative terminal should be connected to ground.
What you say is generally correct but they can be wired the other way and work fine.

Charlie Stephens
Charlie Stephens is offline   Reply With Quote
Old 02-03-2019, 08:08 PM   #17
mhsprecher
Senior Member
 
mhsprecher's Avatar
 
Join Date: Aug 2012
Location: Takoma Park, MD
Posts: 2,111
Default Re: Battery in wrong

My roadster came with the battery installed backwards, with negative to ground. It ran fine. I installed a LED tail ight and it wouldn't work. That is when I discovered it was in backwards and turned it around.
mhsprecher is offline   Reply With Quote
Old 02-03-2019, 08:26 PM   #18
Patrick L.
Senior Member
 
Patrick L.'s Avatar
 
Join Date: May 2010
Location: Upstate NY and western Florida
Posts: 4,830
Default Re: Battery in wrong

You've just received a lot of info, some good some not.

You say the engine starts and the lights work. That will happen no matter how the battery is connected.

What does the ammeter show ? Turn the lights on, meter should show discharge. Start engine and run engine at fast idle, meter should show charge. Lets start there and then we can see where the problem is before we get too crazy here.

If this monster is equipped with a generator with a standard cutout, then its easy to fix. Just let us know what you find.
Patrick L. is offline   Reply With Quote
Old 02-03-2019, 08:48 PM   #19
TerryO
Senior Member
 
TerryO's Avatar
 
Join Date: May 2010
Location: N. GA
Posts: 192
Default Re: Battery in wrong

Quote:
Is it possible to charge in reverse.

Yes, but only if it was completely discharged.


TerryO
TerryO is offline   Reply With Quote
Old 02-04-2019, 08:23 AM   #20
chap52
Senior Member
 
chap52's Avatar
 
Join Date: Jun 2013
Location: Marana Arizona
Posts: 1,264
Default Re: Battery in wrong

I purchased my Tudor from the Grandson of the previous owner who has passed away. The Grandson installed a new 6vt battery and wired it backwards. When it was delivered we had to "jump" it to get it started. I immediately noticed that the new battery was installed neg. ground. Jumped pos to pos, neg to neg. Got it started. Had to keep revs up to keep it running. I assumed it was running off the generator.
Spoke with the Grandson, rotated the battery and reversed the hook ups and it solved the problem. I did re-polarize the Generator. Chap
chap52 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 05:36 AM.