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2017 - 2022 Super Duty The 2017-2022 Ford F250, F350, F450, F550 & F600 Super Duty Pickup and Chassis Cab
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New Switchbacks

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Old Oct 12, 2019 | 11:43 AM
  #1  
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Poncho450
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New Switchbacks

After trying Alla and iBrightstar from Amazon I've finally found the switchback that fits properly. They came from GTR Lighting. https://gtrlighting.com/gtr-lighting...257-led-bulbs/
Many others are trying to pass off 7443/7444 as a fit for these trucks. Wrong. The bases are not the correct bases for the sockets on these trucks. Many of us have used a Dremel or similar tool to remove material to force a fit. I found the fit nowhere near as secure as it should have been. The Alla bulbs stayed in on my 2017 but I was always leery of them. On my 2019 they would not stay in at all, had to give them a single wrap of electrical tape.
These GTR bulbs popped right in firmly with no massaging. Looks like pretty damned good output on them too. Not the cheapest. But as they say - pay once, cry once.
 
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Old Oct 12, 2019 | 12:17 PM
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Did they work correctly, or were adjustments in Forscan required for hyper flash?
 
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Old Oct 12, 2019 | 02:51 PM
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Originally Posted by FractureCritical
Did they work correctly, or were adjustments in Forscan required for hyper flash?
I made the adjustment previously with FORScan for the other LEDs I'd used. But note that the hyper flash is in the instrument cluster only. The lights actually flash at the correct speed when viewed from the exterior.
GTR does sell the bulbs as a kit with resistors for those who don't use FORScan or wish to hook it up to a Ford dealer's IDS. I opted for bulbs only.
 
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