What Might Cause Trailer Battery to Die When Connected to Tow Vehicle

Question:

My trailer battery goes dead when I hook up and travel with it ,Ive check all connection and they are wired right ,battery also checks out

asked by: George W

Expert Reply:

What all is connected to your trailer battery? You'll need to go through the list of all connections made to your trailer's battery so that you can determine what all could be drawing amperage and then make sure all of those accessories are turned off when you are towing.

The 12 volt accessory pin of your 7-way can put a maintenance charge on your battery as well if needed. This is the pin in the 1:00 position on the vehicle 7-way. You'd want to run 10 gauge wire like part # 10-1-1 (sold by foot) to the positive battery post to do this.

expert reply by: Jameson C