Light problem

[Mark 666]

Hi I am a new raptor owner and new to the forum. My 2019 raptor has an interesting issue I wonder if anyone else has had this issue. In the cold weather the rear turn signals flash half as fast as the front. I brought the truck back to the dealership it is currently waiting for an answer from Ford. I have some videos but don’t know how to upload them.

 

[Mark 666]

The truck has gone back to the dealership and they ordered two new lights today I hope that cures it.

 

[Mark 666]

I guess No one else has this problem but the dealer put two new lights in the truck and they don’t work correctly either. Waiting for more lights.

 

[FordTechOne]

Sounds like they definitely misdiagnosed it.

So when you say the rear flash half as fast, are you saying the rear are blinking more slowly than normal or the front are blinking more quickly than normal?

Anything aftermarket on the truck?

 

[The Car Stereo Company]

sounds like a computer problem. theres way too many computers onboard these trucks. a bulb isnt going to fix the problem. most likely the bcm or something in regards to an onboard computer

 

[Mark 666]

The rear lights flash slower than the front lights and the indicator on the cluster. It is also temperature sensitive the problem gets worse in the cold weather the lights are sealed LED and are not serviceable.

 

[Mark 666]

Update Ford replaces both tail lights again and today in VT at -6 degrees the right light works and the left one flashes at half speed so it looks like there are some lights out there with high resistance.

 

[Mark 666]

Update Ford came to my shop with a third set of tail lights that work so far I will know for sure once they get cold. I’m heading back to VT and the temperature is supposed to drop below zero if they work problem solved.

 

[Mark 666]

The driver’s side light still flashes half as fast as the passengers side when the outside temperature drops below freezing. The dealer put the newest light in the freezer overnight before testing it and it failed. The service manager also told me both Raptors on the lot do the same thing so any one in a cold climate with a 2019 Raptor might want to check the rear hazards in the cold.

 

[FordTechOne]

The driver’s side light still flashes half as fast as the passengers side when the outside temperature drops below freezing. The dealer put the newest light in the freezer overnight before testing it and it failed. The service manager also told me both Raptors on the lot do the same thing so any one in a cold climate with a 2019 Raptor might want to check the rear hazards in the cold.

This sounds like a gross misdiagnosis by the dealership. There has been no communication of any "cold climate" taillamp issues on 2019 F-Series, including Raptor. Does the repair order list any DTCs?