We have trailer lights wiring diagram on our website.
Since you didnt state what year make model of vehicle heres a quick cheat to help you. go to the parts store and purchase a trailer plug with the wiring diagram in the box use the diagram to identify the wires for your plug put the stuff back in the box after use and return for a refund. hope this helps
SOURCE: trailor plug camry sv21
You don't need a colour code as long as you have a test lamp or a voltmeter.
Turn the side lights, indicators, stop lights, reverse lights, rear fog lights on individually and test for a positive wire each time. Label them with some paper tape and a pen if it makes it easier to keep tabs on them.
All your lighting wiring is in the back of the car/truck/hatch, whatever. Your rear light clusters will lead you to all the wiring you need. If its any help, the rear light cluster bulb positions give away which wiring leads to which bulbs. You can see the colours of the wires right there.
Good luck.
SOURCE: trying to put a flat 7 pin plug for a trailor in my car camry sv21
Use a multimeter, and test each wire individually as you turn on/off lights. You won't need a colour code with this method.
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