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If that does indeed work, I'd be happy to know it, as one of these days I'll be replacing my dash lights with LEDs, and would like to do a clean sweep. I've seen many posts here saying that the LED won't work in the GEN lights, and I can understand why. This error-free LED is new to me. Thank...

And when the current flow is reversed? I know there are bi-directional LEDs, but with the common uni-directional ones, it would have to be installed with the polarity correct to work the exciter circuit to at least get the alt charging, but would not light in the over-charge condition.

LEDs will not work in either GEN light position. This will cause problems with the exciter circuit, usually resulting in no charge from the alt. LEDs are Diodes, so only allow current flow in one direction. The exciter circuit flows both was, so to speak, depending on which side has the higher...