1947 breakers

To me those look like very modern automotive breakers. I would check them for a part number and then have an auto parts store see if they could find them in a cross reference book. They can then tell you what the values are.
 
I also have a 47 gauge cluster with those on them, I was told they are regulators for the gauges, I was also told they were voltage drops because truck was 12 volts--I would also like to know what they are.
 
I have a bunch of those Littlefuse type of breakers measuring 1-1/4" x 3/4" x 5/8". Current and voltage capacity usually marked on one of the sides. Mine are 8A @ 12v.

Jack E/NJ
 
46WINE said:
I recently got a 47 gauge cluster and attached to the rear was a set of breakers. These are NOT like the normal breakers attached to the firewall. I cannot find any written material regarding this type of breaker. Does anyone have any info on them. How many amps will they carry? Here's a link to a photo of breaker.
http://picturehosting.com/images/BERBATTI/fordbreaker001.jpg
Click to expand...

Those are a common breaker used in 2 way radio installations. They come in various ratings and work very well. The ones we use have a small button on the top to reset them. Besides commercial radio supply places, you could probably get them from truck parts places.
I don't have the manufacturer info because I don't do parts acquisition.
 
These ARE breakers. The same wires that attached to the firewall breaker system are attached to the first pole of these breakers. The second pole has the single wire attached as did the firewall breakers. There is no markings on either one of the breakers. They looked as though they had been mounted to the back of the gauges since 1947.
 
They are circuit breakers for the headlamp & tail lights. Late 1947 and 1948 cars had them mounted to the instrument cluster. This is how my late 47 is set up. In an earlier post I believe Old Henry indicated that his 47 was also set up this way.
 
Hello again; I have checked all my catalogues and none of them show that 51a 12258-a is a valid number. What catalogue do you have?
 
Its in the (Green Bible) Ford Parts & Accessories Catalog 1932-1948. It's listed on page 522. Basic part number is shown in Illustrations on page 575. This shows for 6 cylinder car, but was used on all cars with horns in front of radiator and horn relay on firewall.
 
Yes my 48 v8 came with those but when I rewired my car I used 46 early 47 wiring looms ex Vintage Wiring Harness from Australia. They made me a new RH drive loom from their old patterns but for some reason didn't have the late 47/48 US type looms ( perhaps they didn't use the later wiring on late 47/48 Aussie built Fords?)..... Aussies chime in if you know. That breaker goes with horns that mount behind the grill with the relay on the firewall. I had a set of 46/early 47 horns that mount on the inner fender and that relay relay "piggy backs" on the horn bracket. I also had some early circuit breakers that go on the firewall under the dash, so I used one of those. I had to drill holes to mount it. The holes were already pre punched in the firewall insulation bitumen board but were not in the firewall on my car. You will note there is no resistor with this breaker like the one that is firewall mounted, this is because the resistor was mounted on the coil for late 47/48. Different wiring set up to the earlier cars

GB
 
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