Help - 7 pin trailer connector "to" 4 pin vehicle

[groovzilla]

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!!

[xrvr]

If there is I don't think you would have trailer brakes.

[featherbedder]

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

[groovzilla]

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?????

[Rich W]

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

[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 ...

[featherbedder]

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 ...

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

[featherbedder]

Try uhaul for adapters as they have lots of weird set ups. Bill

[Rich W]

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

[fwjumper]

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

[ijustlee]

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.

[SpletKay06]

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.

[AWCHIEF]

Available at any RV, auto, boat parts store or the ever present wallyworld. Very common device.

[cliffcharb]

This is what I would do for a temporary inexpensive fix.


http://www.etrailer.com/Wiring/Tow-R...FcNkhgodAEkG4w

https://www.etrailer.com/Wiring/Hopkins/HM47115.html

[groovzilla]

thx to all - does anyone have the 7 pin airstream wiring diagram showing various colored wires de-coded

[RamRider]

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"

[TxDave]

Gee whiz! They are easy to find. Buy it right here: https://www.etrailer.com/Wiring/Hopkins/37185.html

[Argosy Heir]

Or you could try these
http://www.harborfreight.com/12-volt...kit-63100.html

[SpletKay06]

This is an actual 7pin adaptor https://www.amazon.com/gp/aw/d/B001G...vkL&ref=plSrch

[groovzilla]

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??