Fitting trailer harness to NAS rear crossmember - Defender Source
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  #1  
Old April 29th, 2014, 09:41 AM
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Fitting trailer harness to NAS rear crossmember

So as we all know, the NAS version doesn't have the big hole in it to fit a recessed and protected 7 pin harness socket. so what have people done to fit on that is well protected off road? Would it be as simple as drilling a big hole in the outer wall to fit one on the inner wall?
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  #2  
Old April 29th, 2014, 10:42 AM
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Not sure if this is the same plug-in that you'd be using as it's the Euro trailer wiring, but essentially this is what I made up (with the help of Briggs providing the other end of the factory harness). It plugs right into the factory wiring on a NAS 90, and essentially allows me to run all of the factory lighting options on the Sankey (including the separate tail/brake lights & turn signals, marker/running lights, etc). Most American trailer wiring has the turn signals and brakes on the same circuit - which is not the case with the UK stuff.
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  #3  
Old April 29th, 2014, 10:45 AM
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That's right...you go boy...get that truck ready!!
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  #4  
Old April 29th, 2014, 11:14 AM
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Quote:
Originally Posted by nathanwind View Post
Not sure if this is the same plug-in that you'd be using as it's the Euro trailer wiring, but essentially this is what I made up (with the help of Briggs providing the other end of the factory harness). It plugs right into the factory wiring on a NAS 90, and essentially allows me to run all of the factory lighting options on the Sankey (including the separate tail/brake lights & turn signals, marker/running lights, etc). Most American trailer wiring has the turn signals and brakes on the same circuit - which is not the case with the UK stuff.

to be clear, I have nothing to pull, but I would like the add the ability to pull just about anything unforseen, and a standard 4 flat pin wouldn't cover electric brakes and charging a trailer battery would it?

I was also referring to location. If I added the Euro socket, would cutting a hole be the best approach for that?
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Old April 29th, 2014, 11:29 AM
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Quote:
Originally Posted by Overlander View Post
to be clear, I have nothing to pull, but I would like the add the ability to pull just about anything unforseen, and a standard 4 flat pin wouldn't cover electric brakes and charging a trailer battery would it?

I was also referring to location. If I added the Euro socket, would cutting a hole be the best approach for that?
You are correct, no electric brakes/etc with a flat-4. You could easily mod the factory harness (like the pigtail I used) and put a US 7-pin trailer adapter on the other end as well.

As far as mounting...well, not sure if you are running a NAS bumper (though probably not), but if you are there are a plethora of mounting options. If you're not (as I am not), I actually just opt for the "plug it in as needed" method. Mine does not stay mounted, but lives in the truck. When I need to hook up the Sankey/etc I just reach under, disconnect the existing pigtail, and plug mine right in and I'm good to go.
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  #6  
Old April 29th, 2014, 11:33 AM
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Quote:
Originally Posted by nathanwind View Post
You are correct, no electric brakes/etc with a flat-4. You could easily mod the factory harness (like the pigtail I used) and put a US 7-pin trailer adapter on the other end as well.

As far as mounting...well, not sure if you are running a NAS bumper (though probably not), but if you are there are a plethora of mounting options. If you're not (as I am not), I actually just opt for the "plug it in as needed" method. Mine does not stay mounted, but lives in the truck. When I need to hook up the Sankey/etc I just reach under, disconnect the existing pigtail, and plug mine right in and I'm good to go.
Nope, I got rid of my factory bumper day 1, so just an NAS xrossmember, which has no trailer harness hole.
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  #7  
Old April 29th, 2014, 11:53 AM
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my crossmember. no harness hole
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  #8  
Old April 29th, 2014, 12:36 PM
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Same dilemma. Been considering a plastic body mounted under. Hate to add a hole but it might be the best way forward. There are plenty listed on etrailer. You can also get adapters from 7 to 4 pin

https://www.etrailer.com/dept-pg-Wir...c-7_Blade.aspx
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