The flasher, when plugged in refuses to recognize the existence of the new lights and does not cause them to light or flash. This includes the rear lights which are still the original lights.After replacing the original front lights by attaching them to the same wiring that the "new" non working lights were just attached to causes the flasher to operate normally.This is why I suspect that the bases for the lights in the original lights must have some circuitry in them that the flasher unit recognizes and which it needs to work.
With the "new" lights installed, bypassing the flasher unit by "shorting" from the power terminal to the light terminal lights both the front and rear light in a continuous glow.
OK !!!I've solved the problem with the non-working aftermarket turn signals. The mistake I made was to assume that the wiring harness BLACK wire was the ground wire and the striped wire was the power supply. WRONG!At least on my G5, it is not.Connecting the black wire to the wire coming out of the new lights threaded stud and touching the striped wire to the new lights case the light blinked merrily.
I've got lots of pics! Unfortunately, that's about all that's left.