The Ford Barn

sphooch · 11-09-2022, 12:26 PM

HI guys can any one tell me the OHM range for the 6 volt ign. coil in a model A.I have a few spares and want to test them to see if they are keepers. thanks THE HOOCH

rotorwrench · 11-09-2022, 12:34 PM

The primary side coil should be close to 1.5 Ohms.

Herb Concord Ca · 11-09-2022, 06:41 PM

The secondary should be about 10Kohms plus or minus 1K.

ndnchf · 11-09-2022, 07:01 PM

Keep in mind that an ohmmeter will tell you if its definately bad. But it won't tell you if its definitly good. You need a proper coil tester to do that. Here is a short video showing how mine works for testing coils and condensers.

https://youtu.be/7thA6UA5kbk

Gene F · 11-09-2022, 07:06 PM

And when they heat up they can start to break down too.

jb-ob · 11-09-2022, 08:02 PM

Sponsored Links (Register now to hide all advertisements)

Hooch,

Just finished testing about 25 coils, majority were junk.

Cold they almost all uniformly push a 6.5 on the 'Good' scale, but hot they fail @ 3.0 'Bad' ....translated, they will start your car but not bring you back home. (Herbrand 660 coil tester)

It was suggested to me last evening, IF you find a 'good one', save it for shows but drive on a new repo.

Your Mileage May Vary

11-09-2022, 12:26 PM	#1
sphooch Senior Member Join Date: Jan 2012 Location: New Jersey Posts: 356	6volt coil question. HI guys can any one tell me the OHM range for the 6 volt ign. coil in a model A.I have a few spares and want to test them to see if they are keepers. thanks THE HOOCH

11-09-2022, 12:34 PM	#2
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 16,440	Re: 6volt coil question. The primary side coil should be close to 1.5 Ohms.

11-09-2022, 06:41 PM	#3
Herb Concord Ca Senior Member Join Date: May 2010 Location: Concord CA Posts: 637	Re: 6volt coil question. The secondary should be about 10Kohms plus or minus 1K.

11-09-2022, 07:01 PM	#4
ndnchf Senior Member Join Date: May 2012 Location: Fredericksburg, Virginia Posts: 766	Re: 6volt coil question. Keep in mind that an ohmmeter will tell you if its definately bad. But it won't tell you if its definitly good. You need a proper coil tester to do that. Here is a short video showing how mine works for testing coils and condensers. https://youtu.be/7thA6UA5kbk

11-09-2022, 07:06 PM	#5
Gene F Senior Member Join Date: Mar 2012 Location: Ohio Posts: 1,975	Re: 6volt coil question. And when they heat up they can start to break down too.

11-09-2022, 08:02 PM	#6
jb-ob Senior Member Join Date: Jun 2010 Posts: 640	Re: 6volt coil question. Sponsored Links (Register now to hide all advertisements) Hooch, Just finished testing about 25 coils, majority were junk. Cold they almost all uniformly push a 6.5 on the 'Good' scale, but hot they fail @ 3.0 'Bad' ....translated, they will start your car but not bring you back home. (Herbrand 660 coil tester) It was suggested to me last evening, IF you find a 'good one', save it for shows but drive on a new repo. Your Mileage May Vary