Trailer Fault - 2020 Expedition

[Jhesse77]

I have 2020 Expedition King Ranch with the heave duty tow package. I'm getting a left blinker trailer fault when connect to two different trailers through the 7pin connection. Hazards work, right blinker works, running lights work, reverse lights work, left blinker does NOT work. Checked the voltage coming out of the truck side connection and it looks good. Any one know what fuse controls the lights? I checked all the fuses and they look good but might be worth replacing the fuse anyway, but the manual isn't clear on what fuse controls trailer blinkers. Anything else I should look at?

 

[Alwaysthinkin]

@Jhesse77 welcome to the forum!
Maybe I'm missing something, but why do you think it is your Expedition with the problem and not the trailers left blinker?

 

[Jhesse77]

Because the problem presents itself when pull my boat and when I pull my travel trailer. I supposed it could be both trailers with the same issue, but seems like that would low probably. Both trailers had the issue when they were purchased brand new.

 

[GlennSullivan]

Try another truck with one or both of your trailers. The Ford factory TBC are very finicky.

 

[Yupster Dog]

Because the problem presents itself when pull my boat and when I pull my travel trailer. I supposed it could be both trailers with the same issue, but seems like that would low probably. Both trailers had the issue when they were purchased brand new.

Tester from Amazon that test your truck wiring and trailer wiring. Under $20 (even cheaper right now with coupon)

https://www.amazon.com/Aramox-Wirin...13-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9tdGY&psc=1
I am not affiliated with Amazon nor the tester. I do have the tester and wouldn't tow without it.


Welcome to the forum

 

[GlennSullivan]

Tester from Amazon that test your truck wiring and trailer wiring. Under $20 (even cheaper right now with coupon)

https://www.amazon.com/Aramox-Wiring-Tester-Trailer-Connector/dp/B08FDPHYWT/ref=sr_1_13_sspa?crid=1UOU2QUQZTBW7&keywords=trailer+light+tester+7+round+pin&qid=1690650635&sprefix=trailer+light+tester,aps,225&sr=8-13-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9tdGY&psc=1
I am not affiliated with Amazon nor the tester. I do have the tester and wouldn't tow without it.


Welcome to the forum

That is very interesting. The item depicted has round pins as opposed to the flat blades which is what would be needed. Do they make a flat blade version or would adapters on each end be required?

 

[Yupster Dog]

adapters

No adapters needed it fits

 

[GlennSullivan]

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.

 

[chuck s]

Easy to Use: European standard trailer connector for ease of use and storage.

From the Amazon listing. The link and all the photos show 7 round pins (EU - type).

Would be great if there was a US version that could test both the truck AND trailer like this one (which won't work).

 

[Jhesse77]

Thank you. I have a tester and everything looks good when connected to the tester.