Trailer Fault - 2020 Expedition

[Jhesse77]

I mean to ask, upgrading the TBC firm ware, I imagine that is a trip to the dealer?

 

[chuck s]

My tester only tests the truck. Does yours test the trailer? Never needed to test the trailer myself 'cuz the lights are easy to see and the brakes can be tested with the break-away switch but a combination tester like the European version linked previous would be handy.

-- Chuck

 

[Yupster Dog]

I'm somewhat confused. I don't see how the pictured adapters pins in the Amazon link above (either male or female) fit into any of my vehicles 7 pin round receivers or my trailer plug.

View attachment 78356

View attachment 78357

I see now, will see if I can find what you are looking for

 

[Jhesse77]

Well my issue is resolved. Turns out it WAS my boat trailer. The left light had the wires reversed when the install was done. I noticed that the left break light was not as bright as bright as the right break light different trucks plugged in. Fix was super easy.

That also means the issue I was observing with my travel trailer is a separate issue, I think that was resolved when I bet the contact a little to ensure proper contact while connect. The travel trailer would cut out intermittently which makes sense that it was a contact issue.

Thank you all for the input.

 

[GlennSullivan]

Thanks for the update / solution

 

[Yupster Dog]

Thanks for the update / solution

Exactly, I wish we had more of this.

 

[Yupster Dog]

I see now, will see if I can find what you are looking for

I'm somewhat confused. I don't see how the pictured adapters pins in the Amazon link above (either male or female) fit into any of my vehicles 7 pin round receivers or my trailer plug.

Still looking and now see your dilemma.