Six problems related to wiring have been reported for the 2015 Ford F-150. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Ford F-150 based on all problems reported for the 2015 F-150.
I stopped while pulling a trailer, fueled my vehicle, hopped back in and the trailer brakes were on constantly. I disconnected 7 way plug and trailer brakes released. I tested trailer braking output at the 7 pin plug and the brake output was stuck on. I turned the gain down to zero and it was still staying on. I checked the trailer for a short and all check showed trailer wiring as ok. I found on an f150 forum many complaints of the same thing happening to 2015 and 2016 f150's and dealers replacing the trailer brakes module and the tow module.
Truck suddenly loses power, electrical systems fail. Repaired multiple times by dealer diagnosing wiring connection fail under seats. Continues to fail. 5 times in shop since 2016, no longer under warranty.
Corroded body control module and wiring. Ford technicians unable to diagnose cause. Caused vehicle to go into limp mode while driving in an unsafe manner.
April 26, 2017 the following components malfunctioned simultaneously when returning to truck from shopping: running boards would not deploy or retract; airbag(s) warning light on dash was lit; climate control system, both heat and cooling was out of service; front windows would not respond to controls; seat comfort functions did not work; mirror adjustment and retraction inoperable; back-up system and warnings inoperable; cross traffic system fault; blind spot warning error. Wiring harnesses replaces and picked truck up may 12th 2017. That evening while driving with a trailer, a message appeared concerning the trailer being disconnected. That disappeared and then the following happened: warning messages began to appear on the driver's display screen saying, �your vehicle is not in park�, �check manual�, �downhill assist not operational�. Then the lights went out, the truck lost power (the engine was still running), it shifted into downhill assist, front windows didn't work, passenger seat moved by itself, driver's seat began to go back as if the truck was turned off, then it returned to driving position, the sync display went dead and came back on, the driver's display shut down and came back on. All these things continued to repeat as bells sounded and I limped 5 miles back to my son's house. Same problems exhibited when son took truck to the dealer the following am without trailer. Another harness replaced. Picked up truck and drove without incident about 800 miles. When starting truck, trailer message reoccurred. There was no trailer attached. Two days later after being parked, all the 1st set of failures reoccurred. Running boards, ac-heat, air bags, windows, mirrors, cross traffic system, blind spot warning were all inoperable.
The contact owns a 2015 Ford F-150. The contact stated that the tailgate slightly detached from the vehicle on its own. The failure damaged the wiring cable on the rear of the vehicle. The dealer diagnosed that the computer wires that were damaged needed to be replaced first in order to properly diagnose the tailgate failure. The vehicle was not repaired. The manufacturer was made aware of the failure, but the contact had not received a response. The approximate failure mileage was 21,000.
New 2015 f150, accelerates and decelerates on its own. Brakes create loud noise. Wiring harness as it relates to the shifting of the truck was replaced within the first six months as well. Auto off frequently refuses to restart. Loss of complete power on highway.