Has a 5 pole socket for trailer wiring

If the trailer has electric brakes that are powered by a separate battery, you use a 4-pole to 5-pole adapter and connect the extra wire to the truck backup light circuit.
4 pin to 5 pin plug for trailer lights The Hull Truth Boating and Fishing...

Unless there is a female plug socket on the front of the radio, there is no way to wire an iPod cord to a car radio.
If there is a female plug socket (3.5mm round hole that usually says AUX), use a double male 3.5mm cord to connect the 2 together.

use a mini adapter to a large one.(3.5 to 1/4) or mini headphone jack to 1/4 headphone jack.plug a male3.5 into your outgoing headphone jack or from the pc convert the other end of that cord to get you to the proper size or 1/4 head phone jack.the primary cord from the pc needs to be a male to female cord.they make adapters that will get you the rest of the way.3.5 mini male to 1/4 phono female.then you plug your amp in to the 1/4 female.wala

Firstly I would not be useing round plugs secondly I would not be wanting to use an adaptor or converter as you call it I would be going with a male & female flat plug. why you ask simply because they are much easier to mount on both your trailer & your cycle eleactricaly one join is safer & far less likely to come apart in service than something with an adaptor in the middle of it as most of the flat variety of plugs are mostly seven pin you wil be left with two unused pins which you can utilise for clearance lights or any other accessory you might care to use later .You will need one pin for common earth one for tail light one for brake light & one for each indicator the easiest way to wire these is to locate the main wireing loom running to the tail light & indicator assemblies determine which wire operates whiich light as you are unlikely to have wire that accurately matches the original I find it use full to draw a diagram indicating the colours onth original loom& their function thenthe colours you have used to run from the loom to the female plug always mount the female plug on the towing vehicle as it is the more weather proof of the two once you have determined your wireing colour code wire the male plug to the trailer makeing sure that th apprpriate wires are conected test as you go is the surest way of getting it right the first time with the satisfaction of a job well done BY YOU qall the best

Both the female and the male part of your plug in are marked. l/t left turn. r/t right turn. s stop. m marker lights. g ground wire. They are supposed to be wired in a universal manner so they will hook to any trailer, and any truck. Is this what you're asking?

You have both signal lights interconnected. Disconnect it, and make sure that the two wires is allocated for each side. Then, connect the two wires to the right signal light of your truck. One for the ground, and the other wire for right signal lightbulb. Then, repeat the process for the left signal light. Use male and female connector, for easy disengagement
of your truck and the trailer.

Does the motherboard have a "purple" socket?
Does your keyboard have a "purple" end?
If so, join the male to the female,
rotating the male until the stiff pins line-up with the holes.

Does the motherboard have a "green" socket?
Does your mouse have a "green" end?
If so, join the male to the female.

The end on the monitor's video-cable has 3 rows of pins;
there's only one place on the computer with 3 rows of holes.
Notice that the sides of the male are tapered,
so that it only fits ONE way into the female.

Similarly, the female end on the power-cord is tapered,
so that it only fits ONE way into the back of the computer.
Note where it connects -- there may be a "rocker" switch,
with a '1' and a '0' on the ends of the rocker.
Press the '0' end down before you reconnect everything.
Press the '1' end down after everything has been reconnected.

Do your PC speakers have a green tip?
If so, then connect the male from the speakers to the green female socket.

Hi ebrown80
You can splice into each wire in turn at the back of the lamps.No need to cut right through the origional loom completly. For a really good joint you should spot solder each connection and insulate all joints well. Tow bar sockets operate on a common earth, so no need to loop each one.
Check back of socket and you will find each pin has a number. 1---7
The wiring colours from the socket back to the loom are as follows
No 1 Pin--- Yellow Wire---Left Side Flasher
No 2 Pin--- Blue Wire------Fog Lamp.
No 3 Pin--- White Wire--- Earth. Must have good contact or nothing else will operate.
No 4 Pin----Green Wire--- Right Side Flasher.
No 5 Pin----Brown Wire---- Left Side Park Light
No 6 Pin----Red Wire-------Brake Lights
No 7 Pin----Black Wire----Right Side Park Light. Centre Pin.
I hope this helps you out
Best of Luck with it
John

Not sure if you know that much about electrical wiring so I will go through it like you don't.
Take the trailer plug out of the female socket at the rear of the car, turn your running lights on, go to the female plug and using a test light check to see which one lights up the test light, that wire will be the running lights wire.
turn the running lights off and turn either your left or right indicator on and check at the plug to see which wire lights the tester, do this for the opposite indicator as well.
Turn the indicator off and get someone to hold their foot on the brake while you test the plug for power.
check the male plug at the rear wire terminals by putting it in the female plug and perform the same test as the female plug, if you have power to all the wires at the rear of the male plug go to the lights at the rear of the trailer and perform the same tests as before.
to get the both rear brake lights to come on you have to run a red wire from the brake light on the live wire side to the light on the opposite side to give it power when you apply the brakes for it to light up.
Turn the ignition on and turn your left or right indicator on again and check the wire for that side, if that is ok do the same for the other side then the running lights, you will have to run another wire off the running light wire to the opposite side of the trailer to give that side power to the lights
ther should be an earth wire from the plug that has to earth the trailer, all the lights also have to be earthed as they will not work if they aren't.
Try that and see how you go, if you do it right they should work for you

Here's a link to the info you need
http://www.accessconnect.com/trailer_wiring_diagram.htm