I have never seen an operation manual for the 750GT. Ive looked hard. The toggle switches and light indicators seem to vary and mine also has the same setup as yours.

one toggle (on the left for mine) operates the gauge back lights

one toggle (on the right for mine) operates the wipers

the two toggles i have are different types. the light toggle is a two way toggle (on and off) the wiper toggle has a center position wich indicated off, an up position which turns the wipers on, and a downdard position that resets the wipers to the downward resting place.

one indicator light turns on with the turn signals (left indicator) same indicator for both left and right turn signal function.

one indicator light turns on with parking lights (center indicator)

one indicator turns on for the headlights (bright headlights)

each indicator is a different color for me.

white, green, red in that order from left to right. i believe that my center indicator used to also have a blue when the regular beam headlight were on but i could be mistaken as it has not do that recently and I might be making that up

there is also a small orange "power" light in the center of the rows that indicated that the key is turned on and the car had electrical power.

I have never known what the other switch(es) and indicator(s) were used for. Could be an option added for something like an extra fan, fuel pump, etc

hope that this helps

mike

If there were such a manual, I and, I trust, many others would have one! Fiat 600 is as close as you can get.