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Under hood Shunt?

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Old Jun 20, 2022 | 01:18 PM
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Under hood Shunt?


Has anyone used these terminals from the engine bay shunt to power say a DC to DC Charger, or anything else?
 
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Old Jun 21, 2022 | 09:43 AM
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There has been discussion on if there is an actual shunt in the Super Duty or not. Did you follow the cable and find a shunt?

My sole experience with a shunt in in my RV, where the shunt is on the negative leg and everything goes through that. To see a larger terminal to the left of the shunt terminal has me scratching my head.
 
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Old Jun 21, 2022 | 09:53 AM
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Yes, that is my experience also. Always on the negative side....This "junction" is right next to the battery, with about an 8" 1/0 red positive cable running to it directly from pos terminal on battery. Only reason I'm calling it a shunt, is that's what it actually says on it along with what I would say are amp ratings, and possibly large, matching fuses.
 
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Old Jun 21, 2022 | 10:02 AM
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Unless there is something behind the terminal in the junction, what I call a shunt and what Ford calls a shunt may not be the same thing. As I recall, the "shunt" that was being discussed some time ago was a cylinder around one of the cables. I think that type would be called a hall effect shunt? So it didn't look like your typical two-post RV shunt.
 
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Old Jun 21, 2022 | 11:40 AM
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That sounds correct. Thanks.....I think for now, until I figure out what this connection is and what purpose, I'll connect my DC to DC Charger directly to the battery. Don't want to confuse any models or whatever! It's just tempting because it's under a cover and would be a cleaner, hidden connection. Thanks for responding, have a great day
 
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Old Jun 21, 2022 | 03:42 PM
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Originally Posted by Ricko

Has anyone used these terminals from the engine bay shunt to power say a DC to DC Charger, or anything else?
Where is this device located exactly?

Are we to assume that of the 4 connections one is for 275 amps, one for "shunt", one for 125 amps, and the right hand lug for 200 amps?

Does someone have a circuit diagram of the 12v system in the 2022 diesels?

Thanks.
 
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Old Jun 21, 2022 | 05:12 PM
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I have the 2021 7.3, Single battery and this Connection in the picture is right next to the battery. It's on the passenger side.
 
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Old Jun 22, 2022 | 07:47 PM
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Still wondering.....

Are we to assume that of the 4 connections one is for 275 amps, one for "shunt", one for 125 amps, and the right hand lug for 200 amps?

 
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Old Jun 22, 2022 | 07:56 PM
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It sure looks that way, although I've not run across anything the describes it in detail. It would have been nice if it was at least mentioned in the owners manual,
 
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Old Jun 22, 2022 | 08:59 PM
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This is interesting for sure. Curious what it could be used for?
 
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Old Jun 22, 2022 | 09:40 PM
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Possibly for the winch option?
 
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Old Jun 23, 2022 | 03:26 PM
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My '22 F450 has that w/ all terminals populated. Just inboard of the passenger side battery, in front of the upfitter relay box. The cable from the battery is that red / black heatshrink cable coming in from above in the top left corner. The 5 cables going downward, I can't tell, but I'd guess the leftmost one connecting directly to the battery cable coming in is from the other battery.


 
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Old Jun 23, 2022 | 05:10 PM
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Houlster, thanks. Yours is obviously a diesel, with two batts, where mine isn't so the empty terminals on mine are making a little more sense. I see all yours are utilized which makes sense also. You have high amperage glow plugs, and possibly something else I do not have.....
 
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