Well, today we have the trailer in the driveway doing window cleaning and a few things inside. No, my 2009 Xterra does not have a brake controller unit. But I plan to get one. I found an adapter for the lights at Amazon but you have to wire in a hot lead to your fuse box using a fuse tap to get aux power to the batteries. I will choose one from the fuse box that only has power when the ignition is on. There are three batteries for this trailer. Two wired together, one separate.
The Xterra has brand new brakes all around, plus that 4.0 liter engine on them is very high torque engine. Should work okay for a short shakedown cruise, but will have to install the controller soon.
Thank you to everyone for your advice.
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1998 Jayco Eagle Lite M210, 30th Anniversary Edition, 17 feet, restored with mods.
2003 Infiniti QX4. 90% Boondocker in the Pacific NW.