They are pretty easy to install. I replaced an old set up so my wiring was already done. They ran pos wire to a circuit breaker under the bonnet and ran wire down the chassis to a bung under the drivers seat then back up to the controller. The wire from the controller to the trailer plug went back out through the bung and the wire followes the chassis to the back of the car. The brake Sense wire was connected to the wire on the back of the Brake pedal.
http://www.nissanpatrol.com.au/forum...2017/09/84.jpg
The control box is behind the plastic panel under the steering wheel attached by the silver bolts in the picture. Make sure you use at least 4 mm wire. You can buy it on eBay. It's the correct color code twin core with both red and blue wire
Cheers
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