New '27 F250 Lariat, no rear running lights

[obsessive car disorder]

Good Morning,

Was going to dinner last night and a very nice lady followed me to my parking spot and told me the rear lights were out.

Going to inspect the wiring in the rear to assure wiring connections are seated correctly. Only got a supplemental manual that does not have fuse designation chart, but I believe the BCM fuse that controls the running lights, (I think) is in the engine bay fuse box. Fuse 15 and 106, both 30A fuses.

Going to also disconnect the battery ground to see if that clears things up should the wiring connectors prove ok, but only had the truck a week today, so hopefully get this sorted.
Last night was dark and rainy so going to check things out now. Lic plate light works as do turn signals and brake lights, so don't think its a fuse.

Any other thoughts on what to check, appreciated.

Thanks

 

[MVI]

I'd take it to the dealer to document/fix the issue. Never know it this becomes a recurring issue or larger bcm issue

 

[Modman]

Good Morning,

Was going to dinner last night and a very nice lady followed me to my parking spot and told me the rear lights were out.

Going to inspect the wiring in the rear to assure wiring connections are seated correctly. Only got a supplemental manual that does not have fuse designation chart, but I believe the BCM fuse that controls the running lights, (I think) is in the engine bay fuse box. Fuse 15 and 106, both 30A fuses.

Going to also disconnect the battery ground to see if that clears things up should the wiring connectors prove ok, but only had the truck a week today, so hopefully get this sorted.
Last night was dark and rainy so going to check things out now. Lic plate light works as do turn signals and brake lights, so don't think its a fuse.

Any other thoughts on what to check, appreciated.

Thanks

I had some lighting issues on my truck soon after taking delivery. The circuit was controlled by the BCM, there wasn't any serviceable fuse (interior, though, not exterior). Ended up being a pinched line that quickly shorted. Agree with @MVI I would schedule a service appt.

 

[obsessive car disorder]

I'd take it to the dealer to document/fix the issue. Never know it this becomes a recurring issue or larger bcm issue

I am one who likes to do my own work, but Thats a Very Good suggestion and valid point I did not think of.
Just called them and will swing by there.Hopefully nothing serious.

 

[obsessive car disorder]

Took to the dealer

All connections in the rear were ok so no issue there
Troubleshooting took a few hours tracing the wiring to isolate the issue
Turned out a connecter under the hood was not seated properly and this resolved the problem.
I prolly would not have found that so glad its resolved
Dealer pre inspection fell short as they did not catch this so will be having a discussion with them about it
Otherwise, Really Happy with this truck.
Thanks for the help and advice.

 

[Modman]

Took to the dealer

All connections in the rear were ok so no issue there
Troubleshooting took a few hours tracing the wiring to isolate the issue
Turned out a connecter under the hood was not seated properly and this resolved the problem.
I prolly would not have found that so glad its resolved
Dealer pre inspection fell short as they did not catch this so will be having a discussion with them about it
Otherwise, Really Happy with this truck.
Thanks for the help and advice.

That's great news! Glad they were able to get you back in quickly and find the root cause.

 

[The Evil Twin]

Took to the dealer

All connections in the rear were ok so no issue there
Troubleshooting took a few hours tracing the wiring to isolate the issue
Turned out a connecter under the hood was not seated properly and this resolved the problem.
I prolly would not have found that so glad its resolved
Dealer pre inspection fell short as they did not catch this so will be having a discussion with them about it
Otherwise, Really Happy with this truck.
Thanks for the help and advice.

I’m surprised their inspector didn’t catch it for the safety inspection. Lol! If you don’t mind me asking, which dealer? If you don’t want to say here, PM me. I also understand if you’d rather not say.
BTW, the owners manual is in the Sync now. I didn’t get one either. You can get one for a fee I’m sure. I just have mine bookmarked for easy access. The 27 is most likely the same as 26, but you can find it here:

https://www.fordservicecontent.com/Ford_Content/vdirsnet/OwnerManual/Home/Index?Variantid=11240&languageCode=EN&countryCode=USA&VIN=&userMarket=usa&div=f&buildtype=web

 

[Grabber]

Glad you are fixed up, I hate to say it, but most dealer pre-inspection consists of them throwing 2 gallons of AmorAll on your tires, that's about it.

 

[obsessive car disorder]

Glad you are fixed up, I hate to say it, but most dealer pre-inspection consists of them throwing 2 gallons of AmorAll on your tires, that's about it.

OMG! There was So much tire shine, it took them an hour to apply it all! Think they used 2 bottles! It was all over the paint and I had to wash the truck 2 days after!
I hate that stuff and Shoulda just said No!

The Manassas Dealer was nice, they were professional, and had pricing that ended up being a little less than what I saw at Granger and Brandon Ford or at least on par. Got $1000 off on top because Vet.
I was just dissapointed they did not catch the issue, as the photos I took last Friday showed them not working. I just did not notice as I was in lala new truck land!!

I was able to find the manual online, Thanks. was just used to getting a more detailed one in the glove box. Saw it in the infotainement now. Hopefully I don't have to do a truck reset in the middle of a procedure.

 

[The Evil Twin]

OMG! There was So much tire shine, it took them an hour to apply it all! Think they used 2 bottles! It was all over the paint and I had to wash the truck 2 days after!
I hate that stuff and Shoulda just said No!

The Manassas Dealer was nice, they were professional, and had pricing that ended up being a little less than what I saw at Granger and Brandon Ford or at least on par. Got $1000 off on top because Vet.
I was just dissapointed they did not catch the issue, as the photos I took last Friday showed them not working. I just did not notice as I was in lala new truck land!!

I was able to find the manual online, Thanks. was just used to getting a more detailed one in the glove box. Saw it in the infotainement now. Hopefully I don't have to do a truck reset in the middle of a procedure.

I have used them a bunch for parts. Namely when I changed my transmission pan. They were cool and said to bring back any unopened bottles of ULV and they would return it. Never purchased there, as we get “loyalty pricing” at a different dealer.
Good to hear they took care of you on short notice!

 

[obsessive car disorder]

Yes, I was happy about that even tho it took 3 hours. Thanked them all for getting it sorted and shot the bull with the mechanic for a while. Nice Guys

 

[NEOHIO]

Well, at least you had signals and brake lights. Could have been much worse without.