I'm watching this thread, as I'm also looking for LED Switchbacks the WORK!
I have the GTR Switchbacks from Headlight Revolution. Resistors on the Turn Signals. LEDs programmed in AlfaOBD for Parking and Turn.
When I have the Parking Lights on, and use the Left Turn Signal I get a LF Parking Bulb Out. When I use the Right Turn Signal I get a hyperflash and Right Turn Signal Out.
The Turn Signals work without errors when the Parking Lights are Off.
I'll be the guinea pig.
I just ordered:
GENSSI Switchbacks
Retrofit Source PEAK Switchbacks
Supernova Switchbacks
A second set of Morimoto Resistors
I will be testing the above with and without the AlfaOBD LED setting, and with and without Resistors on the Turn, Parking, and Both.
In other words, all possible combinations.
I will report the results.
RodeoGeorge