Getting a no trailer brake?

[Bobcatou]

I'm testing/practicing some tow things.

I tried activating the electric brakes on my camper through the switch on the console and I got a message on my screen stating "No Trailer" I thought this was weird, because when I disconnected the cable from the trailer and tried to activate the E brake again through the switch on the console, it tells me that the trailer is not connected so the first time, it obviously sees the trailer. It also asks me to connect the trailer through Sync when I start the truck. Any ideas what I am missing here?

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[Ricksc]

Did you set up a trailer profile in sync? Do the trailer lights work when hooked up? Could be a bad connection.