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That sucks. I really hate the fact that this is happening when I recommended the lights. But something for me to keep in mind should any LED needs happen in the future.
GTR, finally got back to me and credited my account for future purchase, would of preferred if they credited my PayPal account .
I ordered and installed the GTR 4257 switchbacks in my 2019 F250 without any issues. I have had them in for about 2 months and they are working great. I solid snap in when installed. I used FORScan to eliminate the need for resistors.
Yes, for 2019-2021 Ford F-150 front turn signal lights bulbs, the OEM bulb is 4257/4257NA, not 7444NA (the owner manual is incorrect), 4257 is also different with 3157 bulbs, so if you want to upgrade to LED, it is recommended to try Alla Lighting4257 LED switchback bulbs, which is same base as OEM bulb, please note due to the led bulbs draw much less current than stock lamps, extra load resistors maybe required to avoid the signal hyper flash. 4257 4257NA LED Switchback Bulbs Turn Signal Lights for 2019-2021 Ford F-150
I haven't switched out my bulbs yet, but everything I read is the 6.7 diesel has a different set up than the gas. You can't get to the back of the headlights without removing the grille. If that isn't the case, let me know. This would definitely change my mind on the order I want to set up my light bars and to the swap.
I haven't switched out my bulbs yet, but everything I read is the 6.7 diesel has a different set up than the gas. You can't get to the back of the headlights without removing the grille. If that isn't the case, let me know. This would definitely change my mind on the order I want to set up my light bars and to the swap.
My only experience is with 6.2 and 7.3 gassers. But some suggestions from my experience and from what some diesel owners have posted include - Removing one battery or the other depending on your application, removing the washer fluid tank snorkel and removing the air intake snorkel.
Maybe this will save you the headache of grille removal. I've done it both ways. I got so I could change all 4 headlights out of a 6.2 in about 15 minutes without removing anything. My 7.3 with dual batteries was a little different animal.
Last edited by Y2KW57; Jan 13, 2021 at 10:49 AM.
Reason: Changed "7.2" to "7.3". We all knew what you meant, but those coming over from Ram might not!
