7 pin wiring for a travel trailer

[super dave]

Not Kong ago I put up a post on installing a 7 pin wiring system to tow a travel trailer and installing a brake controller. It WS a lot more complicated than I thought so I paid a mechanic to install. Upon inspection, I noticed he used my existing wires from my 4 pin and installed only one more wire and used the wrong plug. He still used a 7 pin plug but round not flat for the pins. I know nothing about the wiring. Can only 5 wires be used to have everything functional? Is, brake lights, turn signal, brake controller.... or did I get hosed!?

[DRIFTER_016]

Yes, you really only need 5 of the 7 wires.

The other two are reserved for power to give voltage to charge an on board battery on the trailer.

[Fisherman]

Go to Princess Auto or CTC and get the 7 pin flat blade connector for the vehicle end. Use the same 5 wires he did, the other 2 are for trailer power from the tow vehicle and reverse lights, neither are really needed.

[super dave]

I have the flat 7 pin plug. I tried connecting by colour code and it didn't work. Would anyone know which how I should connect each wire? The new wire I'm assuming is for the brake controller. Is that the middle?

Thanks in advance for replies. I would love to get this resolved by today.

[DRIFTER_016]

Google is your friend.

 

http://www.etrailer.com/faq-wiring.aspx

[super dave]

Thanks dave. It worked. I tried another Google diagram before but must have been a diff 7 pin? Not sure.