Originally Posted by Stan_R80/7
the instrument indicator bulb needs to be driven from the flasher relay
The green/yellow from the flasher relay makes the turn signals flash, it is the power to the signal bulbs, routed to left or right by the turn signal switch; think of the green/yellow as on-off-on-off power or "flashing". On the Hella relay there is a connection for the green/yellow and another for the black/white; they both send the "flashing" power. The black/white wire goes directly to the turn signal inicator bulb (instrument cluster). The SM-1 only has one "flashing" power out-put connection (discounting the running lights/brake flashing connections) for the turn signals to which one connects the green/yellow. This same connection should also power the indicator bulb causing it to flash with the turn signals. One could do a simple test - connect the black/white to the green/yellow at the SM-1 terminal and give it a try.