Isolation Solenoid Recommendation for Preventing a Trailer Battery from Draining Vehicle Battery

Updated 04/02/2013 | Published 03/31/2013

Question:

I have a 2000 ford ranger and am planning on wiring a 7 pole connector up in it tomorrow. My question is when wiring a 40 amp circuit breaker to the battery for the hot lead for the breakawy kit will it run down my truck battery if I leave the trailer plugged in overnight? What can I do to only make the hot lead live when the truck is on?

asked by: Greg M

Expert Reply:

What you could do is install a Battery Isolation Solenoid part # PK5231201. You would install this inline with the 12 volt power circuit of your vehicle. You will need to find a circuit that only sees power when the key is on and then run that to the middle post of the # PK5231201.

What this will do is make it so that it will only allow current to go past the solenoid when the key is on.

expert reply by: Jameson C