Installing said ignition on the RGS-no spark, double checked switched "+" and "-" connections to module, both good. When checking wiring at module I do not have a "+" output to optical trigger, which wire off the module is the output to the trigger? When researching the HOA1881-12 optical unit it seems to have two voltage inputs: the cathode & detector emitter (brown & red wires). If this is correct, pin #15 on the module is a solid ground and not the 12v output I suspect it should be. LMK if I'm pissing up a rope, any input appreciated.