LED signal light issues.

What I have been reading and hearing and now have EXPERIENCED is LED lights just don't work on everything.

I tried to replace all of the smaller exterior bulbs on my truck with LEDs. First, I found some wires in the rear had been reversed. No problem with incandescent bulbs. But LEDs are diodes and the polarity has to be correct.

Ok. So going by both a test light AND wiring diagram, I straightened all that out. Still a no go on my turn signals and everything now is dead right. So the old school lights went back in. Piss on LEDs.
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