Led lights

[63burban]

Hey guys, I sell the UPD-90651 and have them is stock (two prong and three prong and also the polarity adapters which is needed for GM applications), I have played with them on all sorts of combinations of lights. They work on all combinations including multiple incandescent set ups. The only problem with them is if you have a burned out bulb you can't tell as the flasher will flash anyway. The cool thing about them is that they flash the same speed no matter the load.
I also handle the LED lights for these trucks, park lights, stepside tail and fleetside tail lights.
Three prong flashers are usually for the aftermarket harnesses that you wire yourself.