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EFV-8 Club Forum / General Mercury Discussion / New Member 48 Mercury questions

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Posted By Discussion Topic: New Member 48 Mercury questions

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Cataldo
06-26-2023 @ 6:24 PM
Member
Posts: 2
Joined: Jun 2023
          
Hello,

I have a 48 Mercury Coupe with an 8BA swapped in. Otherwise stock. I just got it running by hotwiring it. The harness was junk (little original wire anyway). Poorly strung and not worth trying.

I have a new 21 circuit 12v harness for it now.

1. My question is how did they run the wires from the factory out of the firewall? I know that at least most of them came out from the big oval hole on the driver side, did some (engine?) Come through the hole right behind the fuel pump? I see where the stock starter relay, horn relay, and voltage regulator go. That is no problem, I am mostly looking to see how the factory ran the wiring.

I also see some cars with a blower squirrel cage on the passenger side of the firewall, presumably for a heater. I have a factory looking heater box under the dash. What are the differences?

What were the factory wiring harnesses loomed in? Cloth wrapping I assume?

Thank you,
John Cataldo



oldfords
06-28-2023 @ 7:15 AM
Member
Posts: 64
Joined: Nov 2022
          
I am doing a 1948 Merc convertible with now an 8BA engine. Here is how my wiring harness is run through the firewall. You can see it is through a rubber grommet new the voltage reg. Hope this helps

al

TomO
06-28-2023 @ 10:21 AM
Senior
Posts: 7243
Joined: Oct 2009
          
You might want to consider ordering a reproduction harness for easier installation and fit. It looks neater installed than generic harnesses. Here is a topic on recommendations for vendors of reproduction harnesses for Ford products.

https://www.earlyfordv8.org/forum/viewmessages.cfm?Forum=18&Topic=13553

Here is a link that shows how the wiring was routed on a Ford. It is very similar to the Mercury.

http://www.vanpeltsales.com/FH_web/FH_images/FH_electrical-pics/Flathead_Electrical_wirediagram1946-48car.jpg



Tom

Cataldo
06-29-2023 @ 7:17 PM
Member
Posts: 2
Joined: Jun 2023
          
Thank you, those links and pictures do help.

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