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Dec 15, 2020 | 11:51 AM

Kempie

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Joined: Nov 2020

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Looking for help

I’m hoping someone can help me with this. Can you tell me the purpose of this regulator (if that is what it is) on my 1951 Mercury pickup? And also where the wire from the first terminal should be connected? I’m thinking that perhaps this wire may have been connected to the horn. Many thanks for your help as I endeavour to get a bunch of electrical issues solved.

Dec 15, 2020 | 12:01 PM

EffieTrucker

Phantom of the Phorum

Joined: Jan 2011

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From: Kentucky

That is the horn relay. One post goes to power, one post goes to the physical horn, the last goes to the horn button, through the steering column.

Grounding the "horn button" post closes the relay, powering the horn.

Edit: here is a diagram, if you are interested in the inner workings: 1951 Ford F1 horn questions - Ford Truck Enthusiasts Forums (ford-trucks.com)