Positive or Negative to Battery switch
Just got my Torx box installed and my battery switch. Wanting to wire it up tomorrow. I believe I know (negative) but thought I would ask do I put the switch on the Neg or pos? Thanks for your help...
Forum Discussion
Electrically, it doesn't matter which terminal on the battery that you connect the disconnect to. I am assuming that you will disconnect at the battery terminal. Either one will disconnect everything on the trailer.
However, there is a good reason to use the positive. If the disconnect is at the positive you can wire the breakaway switch positive ahead of the disconnect switch and then even if the disconnect is open the trailer brakes will still engage if it comes loose from the TV.
If the negative is disconnected the only short possible would be a direct accidental connection (a wrench or screwdriver)between the two terminals of the battery. If the positive is disconnected the possibility of a direct connection of the terminals still is a hazard and in addition any connection between the positive terminal the the frame of the trailer will result in a short. Earth ground has nothing to do with our trailer's 12V system.
However, there is a good reason to use the positive. If the disconnect is at the positive you can wire the breakaway switch positive ahead of the disconnect switch and then even if the disconnect is open the trailer brakes will still engage if it comes loose from the TV.
If the negative is disconnected the only short possible would be a direct accidental connection (a wrench or screwdriver)between the two terminals of the battery. If the positive is disconnected the possibility of a direct connection of the terminals still is a hazard and in addition any connection between the positive terminal the the frame of the trailer will result in a short. Earth ground has nothing to do with our trailer's 12V system.
