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09-25-2016, 09:56 AM
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#1
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4 Rivet Member
1963 19' Globetrotter
Seattle
, Washington
Join Date: Mar 2012
Posts: 342
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Help - 7 pin trailer connector "to" 4 pin vehicle
All,
My 1965 Airstream Tradewind has the original 7 pin round connector (1st 2 photos)- is there a conversion pigtail so i can connect it to my land rover's 4 pin connector (3rd photo)?
photos below
thx in advance!!
__________________
1968 22' Safari - All Original
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09-25-2016, 10:03 AM
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#2
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Rivet Master
Currently Looking...
Mantua
, Ohio
Join Date: Jul 2005
Posts: 7,062
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If there is I don't think you would have trailer brakes.
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09-25-2016, 10:14 AM
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#3
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Rivet Master
1976 31' Sovereign
Oswego
, Illinois
Join Date: Jan 2007
Posts: 2,017
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Yes can pur. or make one, simple to do. There will not be any trailer brakes w/4pin connector, only tail lites stop and turn, 4th ground. No trailer brakes bad idea, and dangerous. I do this adapt. for single axle small boat trailer and small utility trailer, neither have brakes, so no danger. Bill
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09-25-2016, 10:55 AM
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#4
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4 Rivet Member
1963 19' Globetrotter
Seattle
, Washington
Join Date: Mar 2012
Posts: 342
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where can i purchase a 7 pin round female "to" 4 pin flat adapter??
**i do not need brakes - just towing short distance**
i have searched everywhere and only find 7 blade female adapters not round?????
__________________
1968 22' Safari - All Original
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09-25-2016, 11:07 AM
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#5
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Rivet Master
2006 23' Safari SE
I'm In
, Kentucky
Join Date: Dec 2012
Posts: 4,251
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eTrailer has a 'fit' guide. Looks like you'll have to make one. They have the parts but you can probably go to Lowes, Home Depot or an auto parts store and get the pieces you'll need. I might suggest you just get the male flat plug and splice that to the round plug's wires for a temp fit
http://www.etrailer.com/wiring-adapt...lat&tw=7-Round
__________________
-Rich
Rich & Yvonne
2006 Safari SE -Dora-
2004 4Runner SE 4.7L V8
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09-25-2016, 11:33 AM
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#6
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Rivet Master
2013 31' Classic
billings
, Montana
Join Date: Feb 2010
Posts: 3,607
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There is not adapter to go from 4 to 7, there is a reason for that, Hello, the 4 pin is for a single axle boat trailer w/o brakes or charging wire... If going a short ways , pull it with your bicycle ...
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09-25-2016, 12:28 PM
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#7
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Rivet Master
1976 31' Sovereign
Oswego
, Illinois
Join Date: Jan 2007
Posts: 2,017
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Quote:
Originally Posted by tjdonahoe
There is not adapter to go from 4 to 7, there is a reason for that, Hello, the 4 pin is for a single axle boat trailer w/o brakes or charging wire... If going a short ways , pull it with your bicycle ...
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They make flat 7 pin adapter to 4 pin as I have pur many [to lazy to make]. 4 pin is used for many trailers besides boat trailer that doesn't have brakes. Bill
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09-25-2016, 12:35 PM
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#8
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Rivet Master
1976 31' Sovereign
Oswego
, Illinois
Join Date: Jan 2007
Posts: 2,017
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Try uhaul for adapters as they have lots of weird set ups. Bill
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09-25-2016, 12:37 PM
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#9
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Rivet Master
2006 23' Safari SE
I'm In
, Kentucky
Join Date: Dec 2012
Posts: 4,251
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All the adapters I was able to find are for a 4 pin male trailer plug to a round TV connection. They have them for flat or round pins. I could not find any for a round or flat 7 pin trailer to a 4 pin TV connection.
The easiest way would be to just splice a 4 pin male plug onto the wires of the round 7 pin. There would not be any trailer brakes, agreed, not the best situation. If the TV has only the 4 pin flat plug now I would think the best thing to do is to convert to a 7 pin flat connection, going to need one anyway. Then you just need a round to flat pin adapter for the AS.
http://www.etrailer.com/Wiring/Hopkins/47595.html
__________________
-Rich
Rich & Yvonne
2006 Safari SE -Dora-
2004 4Runner SE 4.7L V8
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09-25-2016, 12:47 PM
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#10
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3 Rivet Member
1998 34' Limited
Alto
, Georgia
Join Date: Jul 2008
Posts: 224
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Install a 7 contact flat blade round connector on the trailer.(Link below) You can then buy that adapter to 4 flat. (link) The flat blade contact round connector is more universal these days and would probably be what you would want to use if you ever did need brakes or bought a truck. Most trucks come standard with the flat blade plug and many with the 4 flat also. If you convert the trailer, you'll be done. These items may be available at some camping RV dealers too. Main plug almost for sure. Adapter, maybe not. If your Range Rover wiring is properly grounded, the ground in the flat plug will be adequate for lights. The extra wires on the adapter are for 12v or other uses and the extra, heavier ground is for those purposes. You should be able to plug and play after you install plug on the trailer.
https://www.amazon.com/Reese-Towpowe...ler+plug+7+way
https://www.amazon.com/57184-4-Way-7...railer+adapter
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09-25-2016, 12:56 PM
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#11
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4 Rivet Member
1973 31' Sovereign
Middletown
, California
Join Date: Oct 2013
Posts: 424
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Just buy the 4 pin plug at any auto parts store or WalMart and strip about an inch of insulation off the wires. Fold the bare wire up into a wad and stuff the right wire into the right hole of the 7 pin. I do this a lot. I have even stuck the brown wire into the brake connection and a 25 amp fuse into the tail light spot so in case of really needing to stop I can turn on the parking lights. Yes, I want to be a Redneck when I grow up. Make sure you have good insurance also.
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09-25-2016, 01:03 PM
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#12
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4 Rivet Member
1991 25' Excella
Stanfield
, Oregon
Join Date: May 2016
Posts: 317
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Check with farm supply stores or auto parts stores the adaptors are out there I've got one in the garage I haven't used in years.
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09-25-2016, 01:03 PM
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#13
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Rivet Master
2006 23' Safari SE
Biloxi
, Mississippi
Join Date: Nov 2011
Posts: 8,278
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Available at any RV, auto, boat parts store or the ever present wallyworld. Very common device.
__________________
MICHAEL
Do you know what a learning experience is? A learning experience is one of those things that says "You know that thing that you just did? Don't do that."
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09-25-2016, 01:08 PM
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#14
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4 Rivet Member
2021 16' Bambi
2021 22' Bambi
Currently Looking...
North Port
, Florida
Join Date: Mar 2007
Posts: 331
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09-25-2016, 01:14 PM
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#15
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4 Rivet Member
1963 19' Globetrotter
Seattle
, Washington
Join Date: Mar 2012
Posts: 342
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thx to all - does anyone have the 7 pin airstream wiring diagram showing various colored wires de-coded
__________________
1968 22' Safari - All Original
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09-25-2016, 01:16 PM
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#16
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4 Rivet Member
2014 25' Flying Cloud
Temple
, Texas
Join Date: Apr 2016
Posts: 303
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I think I would go the other direction and add a seven wire connection to your TV. That way you do not mess with your original seven wire rev connector, You could still not connect a brake wire if you did not want too,
Remember those famous last words " I did not think I needed brakes"
__________________
2014 Flying Cloud 25FB
2018 Ram 2500; Cummins
Blue Ox WDH
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09-25-2016, 07:42 PM
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#18
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3 Rivet Member
1976 Argosy 26
Fair Oaks
, California
Join Date: May 2010
Posts: 166
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09-25-2016, 07:45 PM
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#19
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4 Rivet Member
1991 25' Excella
Stanfield
, Oregon
Join Date: May 2016
Posts: 317
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09-25-2016, 08:14 PM
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#20
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4 Rivet Member
1963 19' Globetrotter
Seattle
, Washington
Join Date: Mar 2012
Posts: 342
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i did a little rigging experiment using a male 4 way adapter with long wire leads on my land rover's 4 way flat female plug - here is a photo of the tow wires i currently have working on the trailer - wires are marked and working on trailer. turn signals, tail lights work well and i'm amazing considering they haven't been used in years.
the clearance lights should be working(same wire as tail lights which work) but they all must be badly corroded so i'll take them apart tomorrow and clean them out. hopefully get them working.
so the 3 holes on the trailer connector which have no wire leads into their sockets are: brakes, charging line & reverse lights.
**does the charging line allow current into the trailer so the interior 12v lights will operate while hooked up to car??
__________________
1968 22' Safari - All Original
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