2015xlt
New Member
I have searched as much as I can and have not found the same issue that I’m having. I will give as much info as I can:
2015 Expedition xlt with HD tow package.
I have towed multiple trailers with 4 pin and 7 pin and never had an issue. Trailer brakes work as desired.
I purchased a new trailer; with two axle brakes. First few times I towed no issue.
I towed again and it stated “trailer wiring fault” and no trailer brake engagement. All lights still working great.
I brought expy and trailer in the shop and checked all the connections. Found no issues. Went to leave my shop and brakes were locked up (fully engaged) unable to release brakes unless I unplugged 7 pin. As soon as I plugged back in they fully engaged. Tried messing with it for awhile until I noticed a lovely burning smell coming from the dash. Immediately unplugged 7 pin and ripped the ITBC out of the dash and unplugged it. It was very hot, obviously fried.
Took trailer back to dealer and had them go through the trailer and test of their machines and on multiple vehicles there with no issues.
I ordered a new ITBC module, installed and connected 7 pin. Again instantly fully engaged brakes and fried that ITBC.
Again trailer works fine on other vehicles. No shorts, no grounding issues. Without my ITBC installed lights work, no loose connections, good ground.
Any suggestions before I fry another ITBC?
Edit: should I keep trying with the OEM or just install and aftermarket?
When installing the aftermarket will the error codes stop displaying “trailer brake module error” or do I need to go in forscan and delete/remove the option?
Thanks!
2015 Expedition xlt with HD tow package.
I have towed multiple trailers with 4 pin and 7 pin and never had an issue. Trailer brakes work as desired.
I purchased a new trailer; with two axle brakes. First few times I towed no issue.
I towed again and it stated “trailer wiring fault” and no trailer brake engagement. All lights still working great.
I brought expy and trailer in the shop and checked all the connections. Found no issues. Went to leave my shop and brakes were locked up (fully engaged) unable to release brakes unless I unplugged 7 pin. As soon as I plugged back in they fully engaged. Tried messing with it for awhile until I noticed a lovely burning smell coming from the dash. Immediately unplugged 7 pin and ripped the ITBC out of the dash and unplugged it. It was very hot, obviously fried.
Took trailer back to dealer and had them go through the trailer and test of their machines and on multiple vehicles there with no issues.
I ordered a new ITBC module, installed and connected 7 pin. Again instantly fully engaged brakes and fried that ITBC.
Again trailer works fine on other vehicles. No shorts, no grounding issues. Without my ITBC installed lights work, no loose connections, good ground.
Any suggestions before I fry another ITBC?
Edit: should I keep trying with the OEM or just install and aftermarket?
When installing the aftermarket will the error codes stop displaying “trailer brake module error” or do I need to go in forscan and delete/remove the option?
Thanks!
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