I am hoping I can get some troubleshooting advice for the 7 pin connector at the back of my coach. When my toad was set up to be made towable, I had a battery charger installed so I wouldn't have to worry about the toad battery going dead while driving from my blue ox braking system. The line from the batter charge goes to the auxiliary port on the 7 pin connector of the toad. After a long day of driving the car battery is dead and will need to be jumped to bring it back to life. The mechanic who installed the battery charger tested the 7 pin connector on the coach and there isn't any power to it when the coach engine is running. I thought the aux connection would be hot when the engine is running to provide a charge to the car battery. It came from the factory like this. 2017 Coachmen Pursuit F53 chassis. He thought maybe a fuse was never installed allowing power to run to the 7 pin connector on the back of the coach. Could he be right? Is there anything else I could check? Thanks in advance for the help.