TPB,

I'm not sure on this, but I thought a three pronged flasher was required for 'pilot' lights. The wires, or prongs were, POWER, LOAD and PILOT.

Will your unit accept a three prong unit. If it will, maybe that would be the solution.

I have enclosed a link to some pictures of different aftermarket turn signal units and their wiring. Do you have one of these styles?

http://www.film.queensu.ca/CJ3B/Tech/SignalWiring.html

Stuart