The Ford Barn

hpk 53 · 02-08-2026, 01:13 PM

1940 ford buisness coupe instaled 2 coils both shorted out ,6 vols in no volts out

KiWinUS · 02-08-2026, 01:17 PM

Are points open?

hpk 53 · 02-08-2026, 01:42 PM

yes rebult disturber

Ken/Alabama · 02-08-2026, 02:37 PM

Does it have the resistor underneath the dash connected ?

hpk 53 · 02-08-2026, 04:10 PM

do not know where is it

19Fordy · 02-09-2026, 11:59 AM

Sponsored Links (Register now to hide all advertisements)

hpk53:

Here's the resistor. Look at Post #2. It's on the driver side on firewall.
https://www.fordbarn.com/forum/showt...+dash+resistor

petehoovie · 02-09-2026, 12:40 PM

Quote:

Originally Posted by 19Fordy

hpk53:

Here's the resistor. Look at Post #2. It's on the driver side on firewall.
https://www.fordbarn.com/forum/showt...+dash+resistor

hueyhoolihan · 02-09-2026, 03:21 PM

coils should show continuity between the + and - studs (they could be marked with something like a "FLD" or "BAT" or some other mnemonics) but there will be no continuity at the high voltage (tension) outlet between either stud.

if hooked up to a battery such that one of the coil's studs is connected to one the of the battery's terminals and the other stud is connected to the other terminal, the coil will emit current (and a very, very high voltage current) from the center outlet to ground, only when one of the coil's studs is disconnected from the battery.

the voltage may be high enough to jump an air gap of up to an inch to get to ground.

rotorwrench · 02-10-2026, 11:57 AM

The high tension secondary is connected to one side of the primary but it doesn't form a circuit in a normal sense. It just has access to the breaker that way. Some old ones are marked sw and dist to keep polarity correct.

hpk 53 · 02-11-2026, 03:06 PM

THANK YOU FOR THE HELP THIS , IS MORE INF 1940 FORD BUINESS COUP FLATHEAD 6 VOLT , DISTRIBUTIOR / COIL IN FRONT OF ENGINE , ENGINE IS 221 , Have new coil im afraid to install thanks

35fordtn · 02-11-2026, 03:45 PM

If you are using reproduction 1937-41 Ford coils that look original that is likely your issues. They are made by carpenter and are truly junk/

hpk 53 · 02-11-2026, 07:08 PM

i am using a reproduction with scrip from China bought in us [ drake ]

35fordtn · 02-11-2026, 08:12 PM

That coil and the only original appearing "NEW" coil is made by carpenter. We are a carpenter dealer and refuse to stock them due to the issues with them. Your best bet is to have a original rebuilt by Skip Haney, or use a adapter plate with a modern type .8 ohm round coil.

hpk 53 · 02-12-2026, 02:31 PM

how do i find skip haney

corvette8n · 02-14-2026, 01:36 PM

Quote:

Originally Posted by hpk 53

how do i find skip haney

https://skipscoilsandpumps.com

petehoovie · 02-14-2026, 02:23 PM

Quote:

Originally Posted by hpk 53

how do i find skip haney

Specializing in 1932 - 1948 Ford Flathead Coils, 1932 - 1953 Ford Flathead Water Pumps,
Also V-12 Lincoln and Mercury

George (Skip) Haney Coils and Pumps

941-505-9085
941-639-0920
[email protected]

Hours

Monday - Friday: 9am - 5pm

hpk 53 · 02-14-2026, 02:35 PM

thank all of you for the help

hpk 53 · 02-15-2026, 03:47 PM

how do you test ignition resistance , what dose it do

hpk 53 · 02-15-2026, 05:09 PM

thank all ,i found the problem

tubman · 02-15-2026, 07:38 PM

Well, what was it? We love solutions. Tie a bow on this thread.

02-08-2026, 01:13 PM	#1
hpk 53 Junior Member Join Date: Apr 2025 Posts: 10	ing coil 1940 ford buisness coupe instaled 2 coils both shorted out ,6 vols in no volts out

02-08-2026, 01:42 PM	#3
hpk 53 Junior Member Join Date: Apr 2025 Posts: 10	Re: ing coil yes rebult disturber

02-08-2026, 02:37 PM	#4
Ken/Alabama Senior Member Join Date: May 2010 Location: Alabama Posts: 3,455	Re: ing coil Does it have the resistor underneath the dash connected ?

02-08-2026, 04:10 PM	#5
hpk 53 Junior Member Join Date: Apr 2025 Posts: 10	Re: ing coil do not know where is it

02-09-2026, 11:59 AM	#6
19Fordy Senior Member Join Date: May 2010 Location: Coral Springs FL Posts: 11,916	Re: ing coil Sponsored Links (Register now to hide all advertisements) hpk53: Here's the resistor. Look at Post #2. It's on the driver side on firewall. https://www.fordbarn.com/forum/showt...+dash+resistor

02-08-2026, 01:17 PM	#2
KiWinUS Senior Member Join Date: May 2010 Location: Charlotte NC KiWi-L100 available here Posts: 3,415	Re: ing coil Are points open?

02-09-2026, 03:21 PM	#8
hueyhoolihan Senior Member Join Date: Dec 2024 Location: central coast california Posts: 593	Re: ing coil coils should show continuity between the + and - studs (they could be marked with something like a "FLD" or "BAT" or some other mnemonics) but there will be no continuity at the high voltage (tension) outlet between either stud. if hooked up to a battery such that one of the coil's studs is connected to one the of the battery's terminals and the other stud is connected to the other terminal, the coil will emit current (and a very, very high voltage current) from the center outlet to ground, only when one of the coil's studs is disconnected from the battery. the voltage may be high enough to jump an air gap of up to an inch to get to ground. Last edited by hueyhoolihan; 02-09-2026 at 03:30 PM.

02-10-2026, 11:57 AM	#9
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 18,006	Re: ing coil The high tension secondary is connected to one side of the primary but it doesn't form a circuit in a normal sense. It just has access to the breaker that way. Some old ones are marked sw and dist to keep polarity correct. Last edited by rotorwrench; 02-16-2026 at 12:13 PM.

02-11-2026, 03:06 PM	#10
hpk 53 Junior Member Join Date: Apr 2025 Posts: 10	Re: ing coil THANK YOU FOR THE HELP THIS , IS MORE INF 1940 FORD BUINESS COUP FLATHEAD 6 VOLT , DISTRIBUTIOR / COIL IN FRONT OF ENGINE , ENGINE IS 221 , Have new coil im afraid to install thanks

02-11-2026, 03:45 PM	#11
35fordtn Senior Member Join Date: Aug 2010 Location: McMinnville, TN Posts: 2,468	Re: ing coil If you are using reproduction 1937-41 Ford coils that look original that is likely your issues. They are made by carpenter and are truly junk/

02-11-2026, 07:08 PM	#12
hpk 53 Junior Member Join Date: Apr 2025 Posts: 10	Re: ing coil i am using a reproduction with scrip from China bought in us [ drake ]

02-11-2026, 08:12 PM	#13
35fordtn Senior Member Join Date: Aug 2010 Location: McMinnville, TN Posts: 2,468	Re: ing coil That coil and the only original appearing "NEW" coil is made by carpenter. We are a carpenter dealer and refuse to stock them due to the issues with them. Your best bet is to have a original rebuilt by Skip Haney, or use a adapter plate with a modern type .8 ohm round coil.

02-12-2026, 02:31 PM	#14
hpk 53 Junior Member Join Date: Apr 2025 Posts: 10	Re: ing coil how do i find skip haney

02-14-2026, 02:35 PM	#17
hpk 53 Junior Member Join Date: Apr 2025 Posts: 10	Re: ing coil thank all of you for the help

02-15-2026, 03:47 PM	#18
hpk 53 Junior Member Join Date: Apr 2025 Posts: 10	Re: ing coil how do you test ignition resistance , what dose it do

02-15-2026, 05:09 PM	#19
hpk 53 Junior Member Join Date: Apr 2025 Posts: 10	Re: ing coil thank all ,i found the problem

02-15-2026, 07:38 PM	#20
tubman Senior Member Join Date: Dec 2013 Location: Minnesota, Florida Keys Posts: 12,132	Re: ing coil Well, what was it? We love solutions. Tie a bow on this thread.