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Feb 10, 2021 | 07:53 AM

#31

Great Danes

More Turbo

Joined: May 2008

Posts: 677

Likes: 118

From: Ontario, Canada

Quote:

Originally Posted by Poncho450

I don't believe a 3157 will work in the front turns. Here's a link to GTR. You can get amber, red, white or switchback. Pricey, but I think it's for a set of 2. I used 2020 F250 with halogen headlights for reference on this site.
https://www.gtrlighting.com/gtr-ligh...443?quantity=1

Thanks Poncho, I saw those, but I was really hoping that something more affordable was out there. I will likely end up with the GTR bulbs for the front signal and run Alla's in the rear housings.

Feb 10, 2021 | 08:02 AM

#32

Poncho450

Lead Driver

Joined: Oct 2014

Posts: 5,912

Likes: 1,336

From: NY/Canada border

Quote:

Originally Posted by Great Danes

Thanks Poncho, I saw those, but I was really hoping that something more affordable was out there. I will likely end up with the GTR bulbs for the front signal and run Alla's in the rear housings.

When I put the 4257's in my 2019 it was after having Alla that needed the base trimmed and wrapping with electrical tape, even though it was the bulb specified for the truck either by Alla or Amazon's fitment chart. And I find Amazon's fitment chart isn't all that accurate. I once had an Alla fog light LED go bad after a few months. I will say that they sent me a new one quickly and only requested that I return the bad one.
The 4257 GTR snapped in securely so it was worth the money to me. As stated earlier I've fished bulbs out of the headlight housing. No fun. But the 4257 from the 2019 are now snapped securely into my 2020.

Feb 10, 2021 | 08:51 AM

#33

Crotchety Ford truck only

Laughing Gas

Joined: Dec 2019

Posts: 863

Likes: 35

From: MA

Quote:

Originally Posted by Mike Boutilier

Hello there, first post here.

I have a 2020 F250 with halogen headlights. I am looking to swap the reverse lights with LED bulbs. I have tried several of the 7440 bulbs and none of them will fit into the socket. The factory bulb has WT21W on it.

Am I missing something?

Thanks!

Boot

Diode dynamics................ Last year when I went to led backups, after two companies sent non fitting bulbs, diode dynamics sent wrong ones (3rd company) I sent a picture and they sent a fitting bulb that needed a shave somewhere. They fit properly, it was a plastic tab shave, easy, toe nail clippers.