Ford shop manual says verify stoplamps operate properly then turn key to on with no trailer connected-set the gain to 10 on the controller and slide the manual lever to the left to see if LED's light up and that message center says TRAILER DISCONNECTED or CHECK TRAILER.Does the trailer icon light up red or green to show connectivity?
Do the trailer brakes work if you hook another truck to the trailer? If not, the trailer is at fault. If so, the TBC system in your truck needs to be checked out.
Most of the time the cause is in the trailer, but not always.
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2007 F-250 Super Cab Short Bed 4x4 XLT Sport Package 5.4L 3.73 LS Tow Command Presently working as a military contractor in Afghanistan.
On an '05, you might not have brake power output unless you are moving at something like 25 mph. There was a design change early on because of complaints about that.
Suggest you carefully take a test drive to confirm whether they work.
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Folks call me Bill.
Please pass the GREEN nozzle.
2006 F250 XLT SCLB FX4 4x4 6.0L Auto,Magnaflow Turbo Back,RhinoLiner,Retrax Cover,Cab Lights Retro-fit,Overhead Console Retro-fit,Bilsteins,Harpooned,C-Betrs,Fumoto.Fleetwood Pioneer,23'x5,200#
All trailer lights work, truck recognizes trailer, no blown fuses found, no brake power at bumper or bed, no brakes with manual switch either, no dash codes, same truck and trailer setup just hasent been used much lately.................
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