Defender ROW trailer wiring harness / adapter - Defender Source
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  #1  
Old May 15th, 2010, 06:21 PM
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Defender ROW trailer wiring harness / adapter

So I've got a little mystery with the trailer wiring harness that my Defender came with. I'm looking for an adapter to change from what looks to be the UK wiring configuration to the US wiring configuration (either 4-flat or 7-round). The picture below is what is currently wired on my 110...any ideas on where to get an adapter? I've tried all the usual suspects (RDS, AB, RN, etc) with no luck.
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  #2  
Old May 15th, 2010, 06:26 PM
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looks like the standard plug that the DI, DII, 90 and RRC use here in the US

You should be able to get a plug from what you have to a 4 flat at the local dealer or an online shop.
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  #3  
Old May 15th, 2010, 06:28 PM
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Sweet...leave it to me to overlook that it may just be proprietary Land Rover. Didn't look like anything I have on my '06 LR3, but they must've changed that from the old Disco/90/RRC. I'll swing by the dealer on Monday and report my findings. Thanks Dave.
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  #4  
Old May 15th, 2010, 06:28 PM
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Here is one with a picture

http://www.roversnorth.com/store/p-1...er-towing.aspx
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  #5  
Old May 15th, 2010, 06:34 PM
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You know I saw that on RN, but from the pic it looked like it was solid and/or female end...but not that I look again it is the male end, and exactly what I need.
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  #6  
Old May 15th, 2010, 07:34 PM
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I have one. It is short, but I would sell it for half of RN price. It is new.

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  #7  
Old May 15th, 2010, 08:05 PM
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Sold! PayPal?
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  #8  
Old May 15th, 2010, 08:14 PM
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Where is that harness? Should I be able to find it inside or outside?
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  #9  
Old May 15th, 2010, 09:49 PM
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Mine is attached to the bottom right of my rear bumper...outside.
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  #10  
Old May 15th, 2010, 11:32 PM
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Can't you just splice in a 4 pin adapter?
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  #11  
Old May 16th, 2010, 09:33 AM
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Later (300 and Td5) defenders have a proper moulded socket on the rear end lighting loom where you can just plug in a trailer socket (they're about 2' long, as the socket is up by the fuel tank kind of area) so i'd suspect that LR do multi looms for whatever country the vehicle is being sold in.

earlier looms were just "bodged" (well, those brass bullet connections) into the existing wiring loom by the lights.

Here in the UK, a 13pin socket is slowly creeping its way in. apparently they're all the rage in euroland. the socket consists of the permanent and ignition 12v supply for caravans, and a switched loop to immobilise reverse sensors. you can get a 7 to 13pin adaptor over here (obviously it won't have the extra 12v and sensors connected up to it)
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  #12  
Old May 16th, 2010, 11:37 AM
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I think you'll find that simply plugging in a flat four adapter will not work. The trailer plug on the Rover is your standard Every Where But Here 7 pin and most USA trailers are wired for four. The 7 pin assumes separate brake and turn signals or something so you will get brake lights on the trailer but the turn signals won't work. Well, maybe you'll get the right hand turn signal ( no brake light) but not the left, and only one side brake light. All very confusing. When I tried using the 7 pin to 4 adapter on my boat trailer it was messed up. The solution is to get a European to USA wiring adapter. Atlantic British sells a pretty nice one for I think about 60 or 70 dollars. These include what's known as a logic circuit to rectify the 7 pin signals to the 4 pin. Not sure how that is done but I have it on my RRC and it works. You can also find them on FleaBay, but I'd rather buy from a known source. It's easy to hook up and will give you proper trailer lighting.
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  #13  
Old May 16th, 2010, 12:05 PM
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Bill:

You said above that when you used "7 pin to 4 adapter on my boat trailer it was messed up". Is that just a straight US spec boat trailer I'm assuming? I've successfully used the 7-to-4 conversion here with my boat or motorcycle trailer(s) before with no problem (of course that's all US spec).

But if it is a Euro to US wiring issue that causes the issue that may be the obstacle. Worst case scenario I pick up that adapter from Parts Ninja and it doesn't work (or I have to rewire), but I may give it a shot. Is this the kit from AB that you're referring to? (http://www.roverparts.com/Parts/9439A.cfm)
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  #14  
Old May 16th, 2010, 02:02 PM
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Mail me a $20 bill and that will get it to you shipped.

There should be a box in the trailer wiring to make the four flat work. I would keep the factory plug and rewire with a box. The Box is $15 or so if you need it at Wal-mart (I have a spare here).

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  #15  
Old May 17th, 2010, 08:44 AM
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Is that just a straight US spec boat trailer I'm assuming?
Yup. I found all this out when I put new LED lights on it. I thought the lights were messed up until I put a multimeter on it. I'm a dingbat.

Yes, that is the wiring converter thingamajig. It works. Far less hassle than rewiring or otherwise trying to figure the darn thing out.
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  #16  
Old May 17th, 2010, 09:34 AM
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Quote:
Originally Posted by cgalpin View Post
Can't you just splice in a 4 pin adapter?
always trying to cut something...

------ Follow up post added May 17th, 2010 09:36 AM ------

my 7>4 adapter works fine for car trailers, boat trailers, bike trailers etc... I haven't used an adapter box
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Old May 17th, 2010, 09:54 AM
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Thanks Doug...I'm getting the straight adapter from Ron/evilfij so will see if that works before I try monkeying with the wiring. Plus I need to square away the hitch situation we spoke about so it'll be awhile but figured I'd take care of the wiring step first...
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  #18  
Old May 17th, 2010, 02:54 PM
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if Jason drops out i'll take it for that price evilFJ
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Old May 17th, 2010, 03:08 PM
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  #20  
Old May 17th, 2010, 03:22 PM
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Yup, sold to Jason, sorry.

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