Self Cancelling Turn Signal LED Conversion

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Thread Starter


Joined Mar 1, 2014
Hello. My first post! I have a 1982 Suzuki Katana with self cancelling turn signals that I would like to convert to LED's. Of course with just the LED connected, the light will not flash due to lack of current to the flasher unit. I wired a 1.5 ohm power resistor in parallel with the LED to increase the current load on the flasher unit. The flasher unit cycles at approximately the correct rate, but the LED does not light up.

A lower resistance power resistor makes the flasher unit cycle faster, but the LED still does not light up. My guess is that the voltage is dropping below the LED threshold, but why does that occur in a parallel circuit?

Thank you, Dean


Joined Oct 2, 2009
The owners of All About Circuits have elected not to host discussions of automotive electrical system modifications/enhancements due to safety concerns, the potential of legal ramifications and the possible circumvention of vehicle regulations at the state and federal level.

This thread is against the AAC forum rules, Chapter 6, as seen here:

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• Any kind of over-unity devices and systems
Automotive modifications
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• LEDs to mains
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