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DIY: F151-66-830 Flash Mod for LED Bulbs

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Old 04-06-2016, 11:22 AM
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DIY: F151-66-830 Flash Mod for LED Bulbs

Instead of putting load resistor you modify the flasher. Using load resistor defeat the purpose of low battery draw, instead now you have a huge heat output source (the load resistor)

This mod will by-pass the "hyperflash". It will flash about 20% faster than stock.

Lift pin #8, solder jumper wire from Pin #8 to Pin #10
Picture and Orientation of the controller chip is attached

Takes about 10mins from opening up the flasher module to soldering the jumper wire.
Attached Thumbnails DIY: F151-66-830 Flash Mod for LED Bulbs-12961145_10207437358986034_2588471519362295067_o.jpg  

Last edited by rotarydude07; 04-06-2016 at 11:31 AM.
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Old 04-06-2016, 11:32 AM
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The RX-8 is the new Civic so why not.
Old 04-11-2016, 02:55 PM
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Wasn't there a company who sold an aftermarket piece for the flasher module that you can just swap in place that solves this issue?
Old 04-11-2016, 03:51 PM
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Originally Posted by rotarydude07
Instead of putting load resistor you modify the flasher. Using load resistor defeat the purpose of low battery draw, instead now you have a huge heat output source (the load resistor)

This mod will by-pass the "hyperflash". It will flash about 20% faster than stock.

Lift pin #8, solder jumper wire from Pin #8 to Pin #10
Picture and Orientation of the controller chip is attached

Takes about 10mins from opening up the flasher module to soldering the jumper wire.
This is mostly what I did for my LEDs. I just clipped pin 8, did not connect to pin 10. It flashes slightly faster, but it's not civic bad 9k
Old 04-12-2016, 03:14 PM
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Attached is the IC spec sheet for anyone interested...
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File Type: pdf
doc4721-26735.pdf (667.8 KB, 436 views)
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Old 05-14-2016, 09:16 AM
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Thanks for the schematic + data sheet.
Old 05-15-2016, 03:39 PM
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No prob!
Old 05-15-2016, 09:58 PM
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Can you guys post videos of the flashing speed? Also does this mean you can't go back from LED's to the original bulbs?
Old 05-16-2016, 03:42 PM
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Originally Posted by JamesD31
Can you guys post videos of the flashing speed? Also does this mean you can't go back from LED's to the original bulbs?
You can go back to regular bulbs. You just won't get the rapid flash if you have a bulb burn out. That is all it is for. If you want the rapid flash back for a burnt out bulb then you can just solder the clipped lead back together.

Here is a video of flash speed with the pin clipped on mine:

Old 05-16-2016, 08:22 PM
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Here's another video I found showing all the rear LEDs:

Old 05-20-2016, 08:46 PM
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Seems like it still flashes fast to me???
Old 05-21-2016, 09:03 AM
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It flashes a little faster than normal but not nearly as fast as with the pin connected. Try taking one of your bulbs out and see how fast it flashes for comparison.
Old 03-05-2017, 08:22 AM
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Originally Posted by JamesD31
Wasn't there a company who sold an aftermarket piece for the flasher module that you can just swap in place that solves this issue?
yes, google tapturn

flasher replacement that stops hyperblink for LED signal bulbs.. fits rx8 (well, some years)

...adds more function too -- pretty neat gizmo

Last edited by scottmcphee; 03-05-2017 at 08:57 AM.
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