Trailer Socket Changeover Switch

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Looks like it could be Koito Socket 7-pole (JIS) part no. 7TS-1 (1,900 yen or about $16 IN JAPAN)


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and Koito Plug 7-pole (JIS) part no. 7TP-1: (2,000 yen or about $17 IN JAPAN)

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Wow! Hard to believe they still sell that style plug!
They ship to Australia ... :D Maybe one of our Aussie friends could order in a bunch, then resell to the poor folks here in the US.... :idea:
 
Is Australia considered the far east? There is a member already in Japan. Not sure what happen but at one time he was going to try and get a bunch of the eye bolts used with the pintle hook which is also available in Japan. I do have a question what are you towing with a 4X series that requires seven pins? Anything with brakes on the axle is probably too heavy to be towing. Another part needed is the bracket for the socket. The correct bracket is harder to find then the socket. A member was supppose to be having some cut and then would need to be find a break to bend them and weld a seam. That was a few years back never got them.
 
Don't know if it's far east or not but it was listed in the countries they ship to on the web site. :D

Good point on the seven pin plug, an older FJ40 should only require 4 pins, but could use up to 6 pins. Left Turn/Brake, Right Turn/Brake, Ground and Park. A normal 7 Pin plug would add Trailer brake, Aux power (to charge battery or run a Fridge in trailer), and Reverse light. Newer FJ40's could use all seven since turns are separate. They also will require a "converter" to convert the three way lights to normal trailer two way lights.
 
Coolerman said:
Ed, your pic shows a seven way connector but it looks like only 5 wires are connected?
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Well, 6. Tail, Stop, Left Flasher, Right Flasher, Reverse (not usually on trailers, but...), and Ground (Earth for some of you).
I don't know why it's a 7 pole connector, other than possibly standards. This is a 7 pole JIS standard connector.
 
Coolerman said:
Odd, do other countries trailers have separate turn signals? I have never looked into that possibility....
Click to expand...

Here is one in Japan. Unique M416 style trailer project.

Vehicles set up to operate brakes on the axle have a separate wire for that. They draw a lot more amperage then the brakes ligts and voltage is variable to how much how hard to apply the brake as well as how fast they are applied. Different signal then you want to the brake lights. Brakes are just on and off. Instead of a reverse light I think the seven pin in the US has power. My car hauler has a battery to apply the brakes if the trailer loose. Think there is power to charge it when ever it being towed The 4Runners and Land Cruisers imported to the US have the standard seven pin used here. My guess this may be the standard seven pin in other parts of the world.
 
Guess that answers that question!
I tow a lot (camper, boat, two other trailers) and have brake controllers in both my tow trucks. I have no plans to outfit the FJ40 with that ability. It can tow the small trailers without brakes. :D
 
Agree. My theory is that if the thing you're towing needs a brake controller, you shouldn't be it towing with a 40.
 
Woo hoo. Found a friend of a friend in the Phillipines who is ordering me up a new socket and plug.
Powder coat the bracket, get coolerman to make me a new rear harness and I'll be back to original.
 
Awesome! Look forward to seeing the OEM harness and documenting it. Maybe your friend should order a couple extra? I can build the harness and you can sell the plug and switch to them! :D They will have to make their own bracket...
 
I run a 6 pin plug on everything. It is mounted below the rear frame on my 40 with a piece of 1/4 inch "L" steel. Does not hang any lower than the receiver hitch I built. It has on occasion caught on stuff though. I should probably mount it flush in my C channel rear bumper.

I like the 6 pins and run the standard lighting, plus back-up lights. On the 40 it leaves me with one extra/aux. On my other trucks it is for electric brakes. On my 73, the empty plugs for the trailer socket pigtail had backup lights amongst them. Simple to wire. I'm trying to recall how I did backup on my T100, seems it was simple, but maybe I hat to splice in. The 80 series was really simple, backup lights are present behind the spare tire in a separate two prong plug. I happened to have a matching plug from something, plugged it right into my 6 pin that I flush mounted in the rear bumper.

I have some bus/truck backup lights on the back of my tent trailer, really nice when hitting camp at dark, although it blinds the wife while she is directing the trailer placement.

The flasher on my 40 never had any trouble driving the trailer lights. The electronic flasher on my T100 makes for very dim trailer flashes. Put all LED's on the tent trailer, very bright, effective on the 80 too, as similar electronic flasher. I tried the electronic flasher relays for more bulbs, and they did not work unless the trailer was plugged in, never figured that one out.
 
Coolerman said:
Awesome! Look forward to seeing the OEM harness and documenting it. Maybe your friend should order a couple extra? I can build the harness and you can sell the plug and switch to them! :D They will have to make their own bracket...
Click to expand...
This is a friend of a friend and I didn't want to push the favor. I decided that the cleanest way to wire this is to deviate from the stock wiring to the socket. I'll buy a 3 wire to two wire converter since most small trailers combine brake and turn signals. I'll mount that behind the rear bumper and then wire the socket and plug so that the plug output is a standard four pin flat connector that any small trailer can use. This will give me the stock look but be practical.
 
Having tried several of the cheap converters I can highly recommend this converter. You wire it to the tow vehicle battery so that the trailer lights have their own power feed and are not affected by the flasher.
 
Coolerman said:
Having tried several of the cheap converters I can highly recommend this converter. You wire it to the tow vehicle battery so that the trailer lights have their own power feed and are not affected by the flasher.
Click to expand...

Looks very intersting. Around 2001 Toyota went with a separate circuit for the trailer lights on the LC. Had a traler ligh issue once on my 2000 LC. Took out a fuse the locked the transmission shifter. Not a big deal poped a plug and using something sharp to release the shifter except when you in themiddle of backing into the driveway and your blocking the street with a loked up shifter. Was on list of things to do was find some on could use on earlier Toyotas. I had to replace the converted in 99 4Runner disappointing the fact all the trailer wiring was done at port and finding a origianl style convert was impossible. Also disappointing was that replacement I found was made to go on the passenger's side when the converter added at port was on the driver's side. Went to a lot o work to get on he left and not tough the factory wiring. May go this route and run a new curcuit to the battery. I'm also guessing this would work on the early cruisers that the brake and turn signal share the element in the lamp. Just don't wire up the brake signal and it should work. While not stock I perfer this method over using a switch which was very uncommon in North America anyway.

While I planned on wiring one or two of my old cruisers for the old military style round four pin plugs anything else will be either the standard flat four pin or the standard seven pin that everybody including Toyota uses on vehicles set up to tow. Even the 1/4 trailer I would use the old military style pin I will wire a second plug two use the flat four double pigtail. I have a couple old double plug pigtails. Will install the old plug withon the trailer in a obvious location and put the flat four pin in a hidden location.The idea is to keep my trailers and vehicles as generic as possible to tow or tow with.
 
Well as it turns out I purchased a trailer build from a early seventies mini truck. Tail light has 71 marked so 72+ model? Wiring is a mess but easy to straighten out. While I haven't checked it out it had the standard for the time small round six pin plug. Someone made a adapter using a socket normally on the vehicle to a flat four pin with two extra wires I'm guess for brake and reverse. Plan is to install the six pin vehicle socket on the trailer then make up a number of pigtail to match all the possible tow vehicles. Couple of those might possibly be a 4X series with separate turn signals and brake light.

So if anyone is looking planning on getting the six pin version used by Toyota I would be in for two sockets and one plugs.
 
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