GregW
Yoda

Offline
I've tried various different electronic flasher units with no luck.
In reading reviews of some of these bulbs on Amazon, sometimes there is feedback through the marker (parking, or dimmer) light circuit. It can be fixed by installing a 1N5822 diode in each tail light assembly on the parking light wire.I little bit of a resurrection of a old thread but from what I see it's the closet I've found to my problem....
I've installed LED lamps front and back and all works fine with nice light and everything flashes however, when I turn the headlights / side lights on the flashers won't flash and everything just lights up. ...
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The diode idea is a new one. So you just wire it up in line on the tail light wire?