Green In-Line Fuse

[epearce]

After finishing the 7-pin harness upgrade, and installing some backup lights--(they came out really cool), I was cleaning up the 12+ positive terminal block on my 200MK....

What is the green in-line fuse? Its protecting a ~10 AWG red wire coming down from the box?

[DarnDave]

epearce I think we might need a little more info (maybe a picture?) about where exactly you are talking about. A guess would be that is a charging line to the batteries, possibly from the on board converter (assuming you are working near your batteries).

Dave

[epearce]

Its that green one, spliced into the red wire with that closed in crimp. The red wire comes through the floor, the other end of the in-line fuse goes to one of the 12V posts. It was tucked into the 7-pin harness junction box just for protection, it does not wire into the 7-pin.

[JCR GD]

Maybe the "Solar" plug? (if there is one)

[KSC_Travels]

Its that green one, spliced into the red wire with that closed in crimp. The red wire comes through the floor, the other end of the in-line fuse goes to one of the 12V posts. It was tucked into the 7-pin harness junction box just for protection, it does not wire into the 7-pin.

Just a guess here... tongue jack?

[Cate&Rob]

Just a guess here... tongue jack?

I was going to guess the same thing . . . since there is a similar fuse holder for the landing gear on our "pre-auto levelling" 5th wheel.

Rob

[epearce]

Just a guess here... tongue jack?

Nope, the tongue jack power goes directly out to the jack from the +12V, and has an inline fuse about half way out there. The green fuse is on some 10 AWG power going up through the floor. Solar? Power from the AC Converter?

[StephenO]

When trying to trace out Ethernet network cables in the nest, one way to find out where something is connected to is to simply disconnect the cable. Although you really need to be careful doing that, don't want to take critical services or servers down .

Anyways, have you tried just pulling the fuse and see what stops working / receiving power?

[epearce]

When trying to trace out Ethernet network cables in the nest, one way to find out where something is connected to is to simply disconnect the cable. Although you really need to be careful doing that, don't want to take critical services or servers down .

Anyways, have you tried just pulling the fuse and see what stops working / receiving power?

I have thought of that. I had it disconnected when I replaced the closed end wire nut with a in-line crimp connector... it is carrying current even though I did not have much of a load on in the trailer at the time. But if its either the 12+ charging from the Converter, or the Solar Controller, nothing obvious will just stop working. Maybe its the main 12+ line input into the converter/power distribution, that would stop working.

There really should be a page in the manual documenting the location and function of all the little hidden in-line fuses scattered all over the trailer.

[AndrewSmith]

epearce have you figured it out?

I spent a few hours tracing all the power wires between the converter and the tongue, and for the life of me can't understand what this wire feeds.

I made a diagram of what I found. This is the only wire I couldn't trace. It's the one with the question mark, the same fuse you're talking about:



I pulled the fuse and nothing seems to be off.

[howson]

AndrewSmith -- as outlined in the Welcome Letter, it is helpful to have the trailer's VIN available in the forum profile. Many times the Moderators are advocating or doing stuff for members "behind the scenes" but without information it is a harder (or slower) process.

Don't mean to "call you out"--just a gentle reminder for all the readers of this thread. Link to the "How To" here: https://gdrvowners.com/forum/gdrv4li...ofile-a-how-to

Also--the "double stud" in your drawing...are you sure that's not a 30A self-resetting circuit breaker?



Howard

[Jlawles2]

AndrewSmith Andrew, the green fused 30A you are saying changes to a red and white? Have you checked the Refrigerator? Some of the refrigerators have dual feeds, one behind the battery disconnect that powers the control board, and a higher amp load one that controls everything else.

BTW, nice diagram.

[howson]

AndrewSmith and epearce -- the fuse holder in the picture should have a 30A fuse inside and is part of the Transcend's solar prep (all Transcend models). Given where this fuse is, the other end would go to the output of a solar controller (the side that goes to the battery). If you don't have a solar setup of course nothing will stop working when the fuse is pulled.

If you do NOT have a solar setup I'd remove the fuse--otherwise there's a "live" 12V wire somewhere. It will be capped or taped, but I'd still take the extra step of removing the fuse.

Howard

[AndrewSmith]

AndrewSmith Andrew, the green fused 30A you are saying changes to a red and white? Have you checked the Refrigerator? Some of the refrigerators have dual feeds, one behind the battery disconnect that powers the control board, and a higher amp load one that controls everything else.

BTW, nice diagram.

That was it, thanks! Tested by pulling the fuse and/or turning off the battery disconnect switch. Strange that the fridge is not behind the battery disconnect switch. The cable would have been shorter. I wonder if maybe that switch isn't rated for enough amps to handle the fridge as well. Good thing I found this now instead of ending up with a destroyed battery or a fridge full of rotten food.

the fuse holder in the picture should have a 30A fuse inside and is part of the Transcend's solar prep (all Transcend models). Given where this fuse is, the other end would go to the output of a solar controller (the side that goes to the battery). If you don't have a solar setup of course nothing will stop working when the fuse is pulled.

Interestingly if I look at the diagrams in the manual for the fridge and the manual for the solar charger (which I do have): this should have definitely been the output of the solar charger.

Instead I cannot find a fuse for either the input or the output of the solar charger. Maybe they're hiden somewhere else. And the fridge was supposed to have a 15A, not a 30A fuse.