CaravansPlus: Traditional Electrical Installation Guide One earth wire coming from the power inlet must go directly to the chassis and be connected with a Bolt, Nut, and a Spring washer. A second earth wire should then go to all power points, hard wired appliances, and any lights with an earth connector. The wire should How to Wire Electric Brakes on a Tandem Axle Trailer We then run a jumper wire from the electric brake power wire to the right side brake assemblies (see photo). I recommend using 12-gauge wire, # 12-1-1, for the jumper wire and for additional ground wire. If you want to use duplex wire, you can use part # 10-2-1. I have attached an electric brake installation video for you to check out.
Related with caravan electric brakes wiring diagram