I thought of that, but I installed the flasher inside the car, above the drivers side kick panel. Instead on firewall because I wanted to hear the clicking. It is hard to find a good 3 prong 6 volt flasher. The third flasher I tried also had the loud click clock sound. With that and the flashing green light on the lever, I should see it still on.
I strongly considered what Corsair Deluxe suggested, using the amp and oil lights.
David