Confused....Don't you have a manual switch on the dash? My #747 (3-4 years older than yours) has one from the factory. I figured this was standard on ALL SPFs. I flip it on during long lights. In fact, on a recent circuit to the beach and back, I ended up using it so much that I broke the switch!
Finish Line sold me a replacement for $20, and I was even able to knock out the wrist pin and repair the original.
-Deano