Tow Command problems

[4x4chase]

Newbie here. Maybe you can help? I recently got a code on my dash says TBC problem. My owners manual says to take it to a dealer but at 38000 miles I have no warranty!!! Is there anything I can do to check it?? I bought the truck used and the previous owner pulled alot with it (no fifth or gooseneck) I put my camper in it and used a pigtail to connect my camper to the trailer plug! Any advice would help thanks

[mschn99]

this is pretty easy to diagnose. First off you need to check ALL the wiring and look at any splices that may have been made. Fix all of them and recheck. If its setting the light with no trailer hooked up and you know all the wiring is good, you need to replace the tow command module (the actual brake controller) MAKE SURE to check the wiring first, as resistance or shorts will cause the same concern..

[DW3555]

My problem is kind of the same .. though different!

All of a sudden I am getting a TBC Fault when there is no trailer hooked up to the truck at all. This tells me that the problem more then likely is in the controller, or before the controller, since there is nothing showing up on the controller screen. Even when I hook the trailer up, nothing. All lights work fine, just no power to the brakes.

Hate pulling my 18' enclosed landscaping trailer with no brakes!!!

Dave

[salda01]

I had a problem with mine stating Trailer Fault, when their was no trailer connected. Turned out to be water in the 7 pin connector housing. Once it dried no problem.

[DW3555]

When you had the fault, did the lights on the controller itself work? Mine is completely blank .. no lights at all. Everything works through the 7 pin connector except the brakes ... all lights work.

I have had this fault for probably the last 5 - 6 months .. so it should be dry sometime in that time frame.

Thanks though ....

[salda01]

I had nothing plugged in at the time. So it Tow Command would be dark anyway. I would just message at random until it dried. The only times it happened was in the winter when I would go through a car was with the undercarriage spray. I haven't had any problems since.