Electrical Brake controller wiring

[Bobbb]

I am putting in a brake conroller in a honda crv and in the trailer socket in pin number 5 where i am to put the wire from the controller there is already a blue wire in there. Do i remove this or put both wires in number 5.

 

[Drover]

A Blue wire is often the brake controller wire in the wiring harness, runs from 7/12pin to under the dash and usually has a tag on the end under the dash in a lot of vehicles.

 

[Bobbb]

Thanks
I have now located that under the dash.
Would that connecter have the other three wires for the brake controller already in it.

 

[Drover]

One's I've done it was just the wire running to the rear but if it has a connector good chance it is plug and play, check with a multi meter or view the wiring diagram, Mr Google should be able to help on that if you haven't one. Lots of vehicles now require you to pick up the brake light wire from the tow harness at the rear so the ECU doesn't have a hissy fit so may pay to read a workshop manual.