The Ford Barn

Rustedjunk · 07-17-2016, 03:05 AM

I was wondering if there is a way to tell the if a harness is a 51A-14401 (47-48), or a 21A-14401 (42-47). Is there any clues or what to look for?

Kurt in NJ · 07-17-2016, 08:35 AM

I think it is the location of the ballast resistor, later cars had it on the coil, 46 was inside next to circuit breaker---at least it was that way on the 48 i parted for my 46---as for other differences I don't know---well the 48 just had ignition switch like later car, 46 had steering lock

JSeery · 07-17-2016, 09:10 AM

Looking at the wiring diagrams I see very little difference between these years. The 42 has 6 connections to the lighting switch and the 46-48 has 5 and they are connected slightly different. The gauge power is wired slightly different, the 42 runs a wire to the fuel gauge and then from that terminal a separate wire to the temp gauge. The 46-48 has a "y" in the wire to the separate gauges. Not that much difference that is obvious. All years show the ballast resistor located next to the CBs.

Rustedjunk · 07-17-2016, 04:33 PM

The question arised when I was looking at the Denis Carpenter catalogue I seen two cowl harnesses. One for the 42 - 47 Ford, and the other one for the 47 - 48 Ford. Something about the placement of the voltage regulator. I'm looking to buy one from someone on here and we're trying to make sure it will work for my car before I buy it.

JSeery · 07-17-2016, 04:41 PM

That's not what the wiring diagrams show, so guess owner reports are going to be your best bet. Where is your resistor located?

Rustedjunk · 07-17-2016, 11:49 PM

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Mine has the voltage regulator under the dash, which warrants the more expensive harness.

Graeme / New Zealand · 07-18-2016, 01:19 AM

Also last 47s and 48 has different wiring for horns. the relay for it is on firewall and horns behind grill. 42 -46 has horns on left inner fender with the relay mounted on their mounting bracket.

GB

JSeery · 07-18-2016, 06:21 AM

Quote:

Originally Posted by Graeme / New Zealand

Also last 47s and 48 has different wiring for horns. the relay for it is on firewall and horns behind grill. 42 -46 has horns on left inner fender with the relay mounted on their mounting bracket.

GB

Again this is not reflected in the wire routing diagrams, very interesting!

Cecil/WV · 07-18-2016, 07:50 AM

Later model has the resister on the coil, not under the dash.

07-17-2016, 03:05 AM	#1
Rustedjunk Senior Member Join Date: May 2016 Location: St. Paul, MN Posts: 302	1947 Ford car cowl harness differences I was wondering if there is a way to tell the if a harness is a 51A-14401 (47-48), or a 21A-14401 (42-47). Is there any clues or what to look for?

07-17-2016, 08:35 AM	#2
Kurt in NJ Senior Member Join Date: May 2010 Location: on the Littlefield Posts: 6,159	Re: 1947 Ford car cowl harness differences I think it is the location of the ballast resistor, later cars had it on the coil, 46 was inside next to circuit breaker---at least it was that way on the 48 i parted for my 46---as for other differences I don't know---well the 48 just had ignition switch like later car, 46 had steering lock

07-17-2016, 09:10 AM	#3
JSeery Member Emeritus Join Date: Nov 2012 Location: Wichita KS Posts: 16,132	Re: 1947 Ford car cowl harness differences Looking at the wiring diagrams I see very little difference between these years. The 42 has 6 connections to the lighting switch and the 46-48 has 5 and they are connected slightly different. The gauge power is wired slightly different, the 42 runs a wire to the fuel gauge and then from that terminal a separate wire to the temp gauge. The 46-48 has a "y" in the wire to the separate gauges. Not that much difference that is obvious. All years show the ballast resistor located next to the CBs.

07-17-2016, 04:33 PM	#4
Rustedjunk Senior Member Join Date: May 2016 Location: St. Paul, MN Posts: 302	Re: 1947 Ford car cowl harness differences The question arised when I was looking at the Denis Carpenter catalogue I seen two cowl harnesses. One for the 42 - 47 Ford, and the other one for the 47 - 48 Ford. Something about the placement of the voltage regulator. I'm looking to buy one from someone on here and we're trying to make sure it will work for my car before I buy it.

07-17-2016, 04:41 PM	#5
JSeery Member Emeritus Join Date: Nov 2012 Location: Wichita KS Posts: 16,132	Re: 1947 Ford car cowl harness differences That's not what the wiring diagrams show, so guess owner reports are going to be your best bet. Where is your resistor located?

07-17-2016, 11:49 PM	#6
Rustedjunk Senior Member Join Date: May 2016 Location: St. Paul, MN Posts: 302	Re: 1947 Ford car cowl harness differences Sponsored Links (Register now to hide all advertisements) Mine has the voltage regulator under the dash, which warrants the more expensive harness.

07-18-2016, 01:19 AM	#7
Graeme / New Zealand Senior Member Join Date: May 2010 Location: Lower Hutt , New Zealand Posts: 2,126	Re: 1947 Ford car cowl harness differences Also last 47s and 48 has different wiring for horns. the relay for it is on firewall and horns behind grill. 42 -46 has horns on left inner fender with the relay mounted on their mounting bracket. GB __________________ "you can't make honey out of dog sh*t" "You're a long time looking at the lid"

07-18-2016, 07:50 AM	#9
Cecil/WV Senior Member Join Date: May 2010 Location: Gerrardstown, WV Posts: 2,266	Re: 1947 Ford car cowl harness differences Later model has the resister on the coil, not under the dash.