The Ford Barn

Bob from Northport · 04-30-2024, 05:31 PM

Can anyone advise what this electrical box is on the firewall of my 54 Mercury.?? Seems like A HEAVY gauge wire running under the dash to the ignition switch I think..

cadillac512 · 04-30-2024, 05:40 PM

If you have overdrive, is it the OD relay?

Bob from Northport · 04-30-2024, 05:45 PM

I do have an overdrive on the car. Have not tried it yet since I've had the car.

miker98038 · 04-30-2024, 11:20 PM

Big wire to the relay to actuate the pull in coil on the solenoid. Then it switches over to a holding coil internally and the load goes down. I dont have a manual where I’m at, but I thought they were fed right off the battery (on my bird via the starter solenoid) and the coil circuit was thru the ignition. ?

Have you driven those overdrives before?

KULTULZ · 05-01-2024, 12:08 AM

https://www.oldcarmanualproject.com/...age_01_jpg.htm

Oldgearz · 05-17-2024, 06:51 PM

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That sure looks like the OD relay box as mentioned above. Fuse tips it off. If it has 4 wire connections, I'd bet on it.

04-30-2024, 05:40 PM	#2
cadillac512 Senior Member Join Date: Apr 2019 Location: Kansas Posts: 964	Re: 54 Mercury-box on firewall ID If you have overdrive, is it the OD relay? __________________ "It don't take but country smarts to solve the problem" (Smokey Yunick) '41 Merc Town Sedan / 260" 8CM engine '66 Fairlane four door / "warmed up" 302

04-30-2024, 05:45 PM	#3
Bob from Northport Senior Member Join Date: May 2010 Location: 215 E. 6th Street Northport, Michigan 49670 Posts: 955	Re: 54 Mercury-box on firewall ID I do have an overdrive on the car. Have not tried it yet since I've had the car. __________________ Bob from Northport Northport, Michigan

04-30-2024, 11:20 PM	#4
miker98038 Senior Member Join Date: Mar 2013 Location: Kent, WA. Tucson, AZ Posts: 1,414	Re: 54 Mercury-box on firewall ID Big wire to the relay to actuate the pull in coil on the solenoid. Then it switches over to a holding coil internally and the load goes down. I dont have a manual where I’m at, but I thought they were fed right off the battery (on my bird via the starter solenoid) and the coil circuit was thru the ignition. ? Have you driven those overdrives before?

05-01-2024, 12:08 AM	#5
KULTULZ Senior Member Join Date: Aug 2012 Location: IN A 'GALAXIE' FAR FAR AWAY Posts: 6,552	Re: 54 Mercury-box on firewall ID https://www.oldcarmanualproject.com/...age_01_jpg.htm __________________ *** - AT MY AGE, ONE APPRECIATES A STURDY HANDRAIL -**

05-17-2024, 06:51 PM	#6
Oldgearz Senior Member Join Date: Aug 2020 Location: Sagle, Idaho Posts: 361	Re: 54 Mercury-box on firewall ID Sponsored Links (Register now to hide all advertisements) That sure looks like the OD relay box as mentioned above. Fuse tips it off. If it has 4 wire connections, I'd bet on it.