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Front Turn signal bulb for 401a

808 Tremor

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Location
Honolulu
Current Ride
2021 F-150 Tremor (LeadFoot)
I upgraded the front turn signal bulbs with LEDs from Underground Lighting. Thought I would try them out. They have built in resistors with like a mini cooling fan. Crazy the things they come out with now. I guess the resistors can get hot. These are not supposed to trigger the hyperflash. I am not sure of that cause I am still working my hyperflash out with Boosted for my rear LED taillights lol. I changed the codes and I am pretty sure I did it correctly but the hyperflash comes and goes. Weird. But the outside is all good. They advised me to change it via just going into FORScan in the non as built and advised me to disable some of what looks like is the same stuff just not in the coded version. I am going to have to play some more and reach back out to them. I digress.
Anyway these are pretty bright. I am not sure if too bright? I attached some vids and pics. I am sure you can guess which is what. I think the stock bulb for the 401a front blinker is 4257. I am not sure about the 400 and 402 packages.
 

Attachments

  • Underground Lighting part.webp
    Underground Lighting part.webp
    44.3 KB · Views: 125
  • Underground Lighting front blinker.webp
    Underground Lighting front blinker.webp
    22.7 KB · Views: 78
  • Underground Lighting front blinker 2.webp
    Underground Lighting front blinker 2.webp
    16.1 KB · Views: 69
  • Underground Lighting blinker.mov
    5.5 MB
  • Underground Lighting blinker and headlights.mov
    5.3 MB

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