Trailer not registered as connected

Question

Have a 2015 F350 towing a fifth wheelWhen I used to connect cord to the truck the dash would display "trailer connected" and engage brakesNow that alert is not displayed and brakes do not engage- trailer lights work- I've checked the fuses that seem to be related to towing and they all are good- tried cleaning the plugs Any ideas what is wrong?

romore · Answer

Have you got a test light or VOM? Have somebody apply the trailer brake and see if you have power at the receptacl then work back from there. I would suspect the trailer brake fuse but you say you have checked that.

enblethen · Answer

Does the truck have a factory brake controller? Some trucks have two fuses for the brake controller, one control and one brake poweer. check owner's manual.
Just because you have brake lights doesn't mean the brakes have power.

2pawsriver · Answer

When I was test towing a Jayco 4113, it displayed the brakes were not connected, lights and all worked.  When I returned the tech said it was because there was not a battery on board.  Not sure what you are towing, but maybe check your trailer battery connection if it's a Jayco.

Forum Discussion

Trailer not registered as connected

About RV Tips & Tricks

Related Content

Buying and Registering

Power Pedestal Connections

Battery connection

Electrical Connection

water heater connections