Fuse for Toad Aux Braking. Where the doggone Fuse?

[RobinKelly2]

I've got a2003 Brave 36m on a workhorse chassis 8.1L
My toad is a2014 Jeep Grand Cherokee.
I've got the RVI Brake Shadow.
When they installed the Shadow in Jeep, they put the connector for the umbilical cord in a manner that allowed water to collect in plug and rotted it out and it shorted out the power line that supplies the Shadow. It's the center post marked aux. I cannot find the fuse. It's not in either fuse box. Does anyone have any idea where it would be located?
TIA

 

[creativepart]

I can't tell from your photo or description where or what this umbilical is or associated with. To be honest, it looks like something your installer installed and none of us are going to have any idea what some 3rd party installer did.

Give us much more detailed info about the connector, where it's located, is it a factory wired location? Part of the Chassis? Or part of the motorhome?

Here's a link to your motorhome's wiring diagram if that helps:

Table of Contents

 

[Morich]

Are you missing the power feeding from the RV? Or is it not getting where expected on the toad? I think of that center pin power as coming from the RV.
But I'm finding some sort of disconnect with what we find and what you are talking about!

The RV wiring , we get info on from Winnebago for the trailer connector but it doesn't seem to fit for the center pin to be Aux?
Is it clearly marked as Aux or is it possible you are seeing "A" and thinking that is aux?
from the online info, it shows the center as "A" but not aux! Instead it shows being the backup light feed!
We get this drawing info for the connector on the RV:

Six pin connector with center pin "A" connects to circui9t "TR".
From the wiring ID decoder list here:

https://www.winnebago.com/Files/Files/Winnebago/Resources/Diagram/electrical_guide.pdf

We get the info that TR is backup??

Seems we are not all talking the same??

 

[RobinKelly2]

I can't tell from your photo or description where or what this umbilical is or associated with. To be honest, it looks like something your installer installed and none of us are going to have any idea what some 3rd party installer did.

Give us much more detailed info about the connector, where it's located, is it a factory wired location? Part of the Chassis? Or part of the motorhome?

Here's a link to your motorhome's wiring diagram if that helps:

Table of Contents

I'm not looking for a connector. I've already replaced it. The issue is this blew a fuse to the 12v line in the umbilical. We're trying to locate the fuse on the coach that goes to this line.

 

[RobinKelly2]

Are you missing the power feeding from the RV? Or is it not getting where expected on the toad? I think of that center pin power as coming from the RV.
But I'm finding some sort of disconnect with what we find and what you are talking about!

The RV wiring , we get info on from Winnebago for the trailer connector but it doesn't seem to fit for the center pin to be Aux?
Is it clearly marked as Aux or is it possible you are seeing "A" and thinking that is aux?
from the online info, it shows the center as "A" but not aux! Instead it shows being the backup light feed!
We get this drawing info for the connector on the RV:
View attachment 1320757

Six pin connector with center pin "A" connects to circui9t "TR".
From the wiring ID decoder list here:

https://www.winnebago.com/Files/Files/Winnebago/Resources/Diagram/electrical_guide.pdf

We get the info that TR is backup??
View attachment 1320758
Seems we are not all talking the same??

Yes it's a six pin. That center pin is the only pin to feed 12v to the plug. As you see you have RT, Lft and brake on two. Then the clearance/tail on one. And if course the ground. The one marked S is for a brake controller, that's left open as I don't have a brake controller. So that leaves the center pin that should be hot for 12v. It's not so I figure it's got a fuse somewhere for this line.
All the other functions work as they're supposed to.

 

[RobinKelly2]

Are you missing the power feeding from the RV? Or is it not getting where expected on the toad? I think of that center pin power as coming from the RV.
But I'm finding some sort of disconnect with what we find and what you are talking about!

The RV wiring , we get info on from Winnebago for the trailer connector but it doesn't seem to fit for the center pin to be Aux?
Is it clearly marked as Aux or is it possible you are seeing "A" and thinking that is aux?
from the online info, it shows the center as "A" but not aux! Instead it shows being the backup light feed!
We get this drawing info for the connector on the RV:
View attachment 1320757

Six pin connector with center pin "A" connects to circui9t "TR".
From the wiring ID decoder list here:

https://www.winnebago.com/Files/Files/Winnebago/Resources/Diagram/electrical_guide.pdf

We get the info that TR is backup??
View attachment 1320758
Seems we are not all talking the same??

Well hello there the problem. I went out and checked and your right! That center pin is on fact the back up lights. There aren't any pins that are hot to hook the RVI shadow to. I can't believe that shop wired that wrong.

But now the question becomes, where is the a 12v line to hook to. None of the pins show 12v.

 

[Morich]

Yes, that is kind of what I think of when I see a six pin connector as there isn't a normally powered pin. The best I see from using the existing six pin connections would be the top center pin marked TM on the drawing above.
That pins is normally connected to Winnebago wire MM.
That MM circuit is the clearance lights and might bear some checking when running a full time circuit is not good?
One "might" be able to tap the power needed but it will depend on several things which we don't get much info on like the chassis wiring and fusing.
If the MM circuit for the clearance lights on the RV , plus the added lights of the tow car are not too close to maxing out the fuse for that circuit, it might be possible to add whatever item you are needing to power.
But which fuse in the chassis group and where are not shown, so it is a guess that would need checking.
But those questions also involve how much power is needed for the added function???

Before doing that I would want to check the amps used for the combined added load. I would caution to not load that circuit too close or simply swap to a bigger fuse.
The clearance lights are something you would not want to lose on a cold dark night in the middle of no where! Electrical gremlins tend to seek out the worst times to jump up and bite us!

Then there are a couple other ideas to consider since the RV was not prepped for power to for this use?
One which is more "normal" is to run from the battery compartment all the way to the rear and add a new single line connection. This could better assure there was no problem overloading an existing circuit but at the expense of quite a lot more wire and work to run it in.
Second idea is less of the above but not as "standard practice" but more "home made"!

You might find it oay to tie the power needed into some item that is existing. Even if not related but there are several circuits which will be closer for shorter wire running.

One way might be some light like the aisle light? Maybe when towing and wanting the added power point, one could set a program to turn that aisle light on as an indicator and then use that power for the toad function?

But I admit to not having a lot of info on that idea and it would need checking for how much power as well as how and where that light and switch might be!!
Definitely something that the toad install should have covered!

 

[RobinKelly2]

Yes, that is kind of what I think of when I see a six pin connector as there isn't a normally powered pin. The best I see from using the existing six pin connections would be the top center pin marked TM on the drawing above.
That pins is normally connected to Winnebago wire MM.
That MM circuit is the clearance lights and might bear some checking when running a full time circuit is not good?
One "might" be able to tap the power needed but it will depend on several things which we don't get much info on like the chassis wiring and fusing.
If the MM circuit for the clearance lights on the RV , plus the added lights of the tow car are not too close to maxing out the fuse for that circuit, it might be possible to add whatever item you are needing to power.
But which fuse in the chassis group and where are not shown, so it is a guess that would need checking.
But those questions also involve how much power is needed for the added function???

Before doing that I would want to check the amps used for the combined added load. I would caution to not load that circuit too close or simply swap to a bigger fuse.
The clearance lights are something you would not want to lose on a cold dark night in the middle of no where! Electrical gremlins tend to seek out the worst times to jump up and bite us!

Then there are a couple other ideas to consider since the RV was not prepped for power to for this use?
One which is more "normal" is to run from the battery compartment all the way to the rear and add a new single line connection. This could better assure there was no problem overloading an existing circuit but at the expense of quite a lot more wire and work to run it in.
Second idea is less of the above but not as "standard practice" but more "home made"!

You might find it oay to tie the power needed into some item that is existing. Even if not related but there are several circuits which will be closer for shorter wire running.

One way might be some light like the aisle light? Maybe when towing and wanting the added power point, one could set a program to turn that aisle light on as an indicator and then use that power for the toad function?

But I admit to not having a lot of info on that idea and it would need checking for how much power as well as how and where that light and switch might be!!
Definitely something that the toad install should have covered!

That's a ton of good information.
Thanks for that. I was going to go with the separate line back from battery and use the center pin since the RVI shadow was wired into that center pin. BUT since the Shadow is under the hood of the Jeep, why not just tie the Shadow into Jeep via battery. Put a 15a online fuse and a rocker switch and I can just turn it on when we're towing?

 

[Morich]

Lots of different ways that change things in small parts of the decision.
When looking around, it is easy to forget that the chassis battery that we might normally think of as the preferred source will also be connected to the coach batteries as we drive!
so that can mean plucking the power off one is much the same as the other while we are driving!
But that is where I don't have any good ideas of how much current the use will need?
A part of that might be if the use would run the toad battery down is you just used it for power while moving?
Some form of braking control box, I assume?
A wire direct from the battery may be one of the more simple low brain stress ways to go!
I can sometimes buy a lot of wire if it saves my brain!
And it also has the advantage of being far less likely to sneak up and fail at the wrong time!

 

[Scotty B]

Different system, ours is a Blue Ox Patriot that required a 12V cigarette lighter type plug for power. There is a hot feed attached to the battery with an in-line fuse.
Didn't have the patience to read all the posts, but might help...

 

[RobinKelly2]

Lots of different ways that change things in small parts of the decision.
When looking around, it is easy to forget that the chassis battery that we might normally think of as the preferred source will also be connected to the coach batteries as we drive!
so that can mean plucking the power off one is much the same as the other while we are driving!
But that is where I don't have any good ideas of how much current the use will need?
A part of that might be if the use would run the toad battery down is you just used it for power while moving?
Some form of braking control box, I assume?
A wire direct from the battery may be one of the more simple low brain stress ways to go!
I can sometimes buy a lot of wire if it saves my brain!
And it also has the advantage of being far less likely to sneak up and fail at the wrong time!

The RVI brake shadow needs 13/14vdc this is how it knows it's in tow mode. If the TOAD breaks away from coach,it will detect the power loss and automatically apply the brakes

Different system, ours is a Blue Ox Patriot that required a 12V cigarette lighter type plug for power. There is a hot feed attached to the battery with an in-line fuse.
Didn't have the patience to read all the posts, but might help...

It's RVI brake shadow. It has two sources of power. One connects to toad battery to power on and keep toad battery charged and the other needs the power from coach which when running supplies the Shadow with 13/14 volts. This is how the Shadow knows it's hooked up to coach and is in tow mode. Should the toad become disconnected to the coach, and brake away switch pops it cuts the power from coach and the Shadow then applies the brakes on toad so it doesn't run down the road on its own.
Pretty cool system.

 

[RobinKelly2]

I've got a2003 Brave 36m on a workhorse chassis 8.1L
My toad is a2014 Jeep Grand Cherokee.
I've got the RVI Brake Shadow.
When they installed the Shadow in Jeep, they put the connector for the umbilical cord in a manner that allowed water to collect in plug and rotted it out and it shorted out the power line that supplies the Shadow. It's the center post marked aux. I cannot find the fuse. It's not in either fuse box. Does anyone have any idea where it would be located?
TIA

UPDATE
So I've been informed that the six pin umbilical does not have a constant power feed wire. So I'm going to connect to the power source for the generator which is 13/14 volts while coach is running. I'm going to tie it into the center pole on plug. This was originally the backup lights which are no longer used ass they were replaced with two additional tail lights.