Under the hood is best if you have room. The less cable you have between your.
![Auxiliary Battery Wiring Diagram Wiring Diagram](http://casitaclub.com/forums/uploads/monthly_11_2011/post-13713-0-92501100-1321914098.jpg)
Auxiliary Battery Wiring Diagram Wiring Diagram
Wiring an auxiliary battery. You are correct in your description of how to wire in a new auxiliary battery in your enclosed trailer. Use a voltmeter to check for current from the black wire in the seven pin electrical outlet at the back of your towing vehicle. Step 2 figure out where your auxiliary battery will be mounted. There are several ways to wire your winch depending on whether your winch is mounted on a vehicle or a trailer the type of winching and the frequency of winching. You will take the 7 ways 12v power feed and route this to the positive terminal on the auxiliary battery and you will ground the second battery to the trailer frame as you described. The larger cable above is the minimum size required 6 bs 135mm² and matching lug note the wire above it thats the 6mm 459mm² auto cable used by many to do the job its just not up to the task it at all.
How to wire a trailer to charge the trailer battery. The 6 bs cable is about 550 per mtr and you need enough red and black to run between both batteries. Install the correct fuses in. How to wire an auxiliary battery step 1. Setting up a dual battery system is easy. Turn off your vehicle.
Before you begin making any connections you need to be sure you have the correct cables. Step 1 disconnect your starting battery from the system by removing the positive wire from the battery terminal. Electric winches require power from a battery source to operate. To provide power to a winch it must be wired to a vehicle battery or a separate auxiliary battery designated for use with the winch. For safety and efficiency you need to have flat clean and smooth connections.