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 06-09-2019, 08:41 AM   #1
eric.schaefer
Junior Member
 
Join Date: Apr 2019
Posts: 7
Default Battery constantly draining

1931 cabriolet was running great, now the battery goes dead in less than a day. I can charge the battery and drive it and then the next day it is completely dead. Wonít even run the horn or lights itís so dead. Iím not sure how accurate the amp meter is but it does show 15 amp discharge when the key is off and the car is sitting. So something is pulling power when the car is just sitting there.

This is a negative ground 6 volt car. There is no fuse on the starter

Here is what I have checked.

-brake light and lights are not constantly on or stuck on.

- battery cables are not damaged or rusted. Good ground on the negative to the transmission.

-changed the coil out just because it was easy and I had another good coil.


Thanks for any help.
eric.schaefer is offline   Reply With Quote
Old 06-09-2019, 09:03 AM   #2
midgetracer
Senior Member
 
midgetracer's Avatar
 
Join Date: May 2010
Location: Bismarck ND
Posts: 891
Default Re: Battery constantly draining

Probably the cutout stuck and trying to motor the generator.
midgetracer is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 06-09-2019, 09:07 AM   #3
wmws
Senior Member
 
wmws's Avatar
 
Join Date: Feb 2013
Location: Coatesville, Pa
Posts: 528
Default Re: Battery constantly draining

Disconnect the wires coming out of the cutout. Put you amp meter across and see if there is any draw. If you don't have an amp meter just disconnect one wire at a time and see if it helps. You have a bad wire somewhere it is just a matter of finding it.
wmws is offline   Reply With Quote
Old 06-09-2019, 10:39 AM   #4
Tom Wesenberg
Senior Member
 
Tom Wesenberg's Avatar
 
Join Date: May 2010
Location: Mpls, MN
Posts: 27,417
Default Re: Battery constantly draining

Quote:
Originally Posted by midgetracer View Post
Probably the cutout stuck and trying to motor the generator.
Yes, for sure. When you remove the wire from the cutout that goes to the terminal box, you should see a spark if the cutout is stuck closed. Most repro cutouts aren't worth the price of the scrap metal you could sell them for.


I've never had a problem with a good restored original cutout, and some don't even need to be restored.
Tom Wesenberg is offline   Reply With Quote
Old 06-09-2019, 10:49 AM   #5
Jim Brierley
Senior Member
 
Join Date: Jun 2010
Location: Temecula, CA
Posts: 2,905
Default Re: Battery constantly draining

Do as WMWS says, only you may need to use a voltmeter to detect any small drains. I had that problem a few years ago and it was my brake light switch, draining the battery so slowly the lights did not glow, but drained the battery in about a weeks time. Good luck!
Jim Brierley is offline   Reply With Quote
Old 06-09-2019, 05:33 PM   #6
1crosscut
Senior Member
 
1crosscut's Avatar
 
Join Date: Feb 2011
Location: Lincoln, Nebraska
Posts: 1,241
Default Re: Battery constantly draining

Disconnect one of the battery cables and put a test light between it and the battery post. If you have a power draw the light will come on. Start disconnecting wires until the light goes out. When it does you will know where the trouble is.
__________________
Dave

It'll feel better when it quits hurting.
1crosscut is offline   Reply With Quote
Old 06-09-2019, 06:33 PM   #7
CWPASADENA
Senior Member
 
CWPASADENA's Avatar
 
Join Date: May 2010
Location: PASADENA, CA
Posts: 1,306
Default Re: Battery constantly draining

You say 6 volt NEGATIVE GROUND?


Are you running an alternator?


If so, a bad diode in the alternator can drain the battery.


If you are running a stock Model A generator, it should be POSITIVE ground in less it has been modified for a negative ground system.


Chris W.
CWPASADENA is offline   Reply With Quote
Old 06-09-2019, 07:20 PM   #8
Brian in Wheeling
Senior Member
 
Brian in Wheeling's Avatar
 
Join Date: May 2010
Location: Wheeling, WV - U.S.A.
Posts: 238
Default Re: Battery constantly draining

Yes, cutout or alternator...depending on what your running. My 2 cents.
Brian W.
Brian in Wheeling is offline   Reply With Quote
Old 06-09-2019, 08:04 PM   #9
1931 flamingo
Senior Member
 
1931 flamingo's Avatar
 
Join Date: May 2010
Location: new britain,ct 06052
Posts: 8,139
Default Re: Battery constantly draining

How old is the battery??


My 6V pos ground alt system will go dead also IF I forget to hit the "kill" switch .
Paul in CT
1931 flamingo is offline   Reply With Quote
Old 06-09-2019, 10:42 PM   #10
Y-Blockhead
Senior Member
 
Y-Blockhead's Avatar
 
Join Date: Jul 2011
Location: Redondo Beach, CA
Posts: 3,894
Default Re: Battery constantly draining

A bad diode in the alternator will cause it to drain overnight. Oops, saw CW already mentioned this.
__________________
Y-Blockhead
'30 Briggs Town Sedan
'55 Ford Ranchwagon
_________________________________
And once again that is just my 1Ę worth.


https://www.youtube.com/watch?v=aH2TvmjxIFM
Y-Blockhead is offline   Reply With Quote
Old 06-10-2019, 10:15 AM   #11
eric.schaefer
Junior Member
 
Join Date: Apr 2019
Posts: 7
Default Re: Battery constantly draining

Battery is brand new, had to recharge it yesterday because it drained over night. I did what was mentioned and with the battery hooked up I disconnected the yellow wire with black marks on it that is connected to the cutout. It for sure sparked and has power there. When I left it off the cutout the ampmeter showed 0. When I connected it the ampmeter showed 15 discharged. With that being said what is the issue haha? Bad cutout?
eric.schaefer is offline   Reply With Quote
Old 06-10-2019, 10:30 AM   #12
Jim Brierley
Senior Member
 
Join Date: Jun 2010
Location: Temecula, CA
Posts: 2,905
Default Re: Battery constantly draining

More likely the generator.
Jim Brierley is offline   Reply With Quote
Old 06-10-2019, 10:57 AM   #13
eric.schaefer
Junior Member
 
Join Date: Apr 2019
Posts: 7
Default Re: Battery constantly draining

Here is a picture I do not know if itís a generator or alternator
Attached Files
File Type: pdf 2019-06-10 10-56.pdf (1.64 MB, 71 views)
eric.schaefer is offline   Reply With Quote
Old 06-10-2019, 11:14 AM   #14
Bob C
Senior Member
 
Join Date: May 2010
Location: So Cal
Posts: 6,410
Default Re: Battery constantly draining

That's a generator. Not sure whats up with the cut out, where does the blue wire go?
Also looks like you have the wrong water inlet pipe.


Bob
Bob C is offline   Reply With Quote
Old 06-10-2019, 11:34 AM   #15
eric.schaefer
Junior Member
 
Join Date: Apr 2019
Posts: 7
Default Re: Battery constantly draining

Blue wire goes from the backside of the cutout and looks as if it grounds on the generator
eric.schaefer is offline   Reply With Quote
Old 06-10-2019, 02:33 PM   #16
Bob C
Senior Member
 
Join Date: May 2010
Location: So Cal
Posts: 6,410
Default Re: Battery constantly draining

It is hooked to the generator output on the end of the wire you can see.
Is one end of the blue wire hooked to the generator output and the other
end to the cutout ARM ?



Bob
Attached Images
File Type: jpg gen-1.jpg (62.5 KB, 39 views)

Last edited by Bob C; 06-10-2019 at 03:01 PM.
Bob C is offline   Reply With Quote
Old 06-10-2019, 04:10 PM   #17
Ed in Maine
Senior Member
 
Join Date: May 2010
Posts: 592
Default Re: Battery constantly draining

You might also check the wire inside the armoured cable from the ignition switch. The insulation can get brittle and break and ground out. Also, try disconnecting the connections to the head lights. Sometimes the fittings are worn and don't hold the wires properly to the head light shell and ground out. Look for shorts to ground inside the distributor, under the upper plate. Good luck, Ed
Ed in Maine is offline   Reply With Quote
Old 06-10-2019, 04:21 PM   #18
barnstuf
Senior Member
 
Join Date: May 2010
Location: Cape Cod MA
Posts: 2,717
Default Re: Battery constantly draining

Another thought is that cutout is obviously a replacement cutout and may have a diode and not have points in it. If so current only goes one way in a diode and they require a positive ground when installed on a Model A.

On the other hand if the replacement cutout does have points, and the points stick closed,. usually just tapping the cutout body with a wrench creates enough vibration for the points to open
barnstuf is offline   Reply With Quote
Old 06-10-2019, 04:25 PM   #19
Badpuppy
Senior Member
 
Join Date: Dec 2017
Location: Guthrie, OK
Posts: 483
Default Re: Battery constantly draining

Quote:
Originally Posted by Ed in Maine View Post
You might also check the wire inside the armoured cable from the ignition switch. The insulation can get brittle and break and ground out. Also, try disconnecting the connections to the head lights. Sometimes the fittings are worn and don't hold the wires properly to the head light shell and ground out. Look for shorts to ground inside the distributor, under the upper plate. Good luck, Ed
The wire inside the armor is usually grounded except when the points open. That part of the circuit is completely removed when the ignition switch is off - unless the switch is shorted through, which is possible.
Badpuppy is offline   Reply With Quote
Old 06-11-2019, 08:32 AM   #20
Tom Wesenberg
Senior Member
 
Tom Wesenberg's Avatar
 
Join Date: May 2010
Location: Mpls, MN
Posts: 27,417
Default Re: Battery constantly draining

The cutout should have an L bracket to connect to the generator post. No other wire should go to that side of the cutout. If it was my car I'd call Bert's and order a good restored original cutout with the mounting screws and L bracket.


At the same time, you should order the correct 1928-9 lower radiator outlet pipe. Your's is for 1930-1 radiators only.


Bert's 800-321-1931
Tom Wesenberg 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 04:02 AM.