What is the difference on the headlight switch. Not sure what setting to have the headlights on. The three difference settings all seem to work but not sure what the difference is in them.

 

It is for the height of the beam, so when just you driving you leave it at the on position.

As you increase the weight in the back of the car and the front lifts up you need to adjust the lights down so not to blind other drivers so you adjust them by the switch, more you turn switch the lower the light goes.

 

Which is the "on" position? The lights are on with all three options. Would the middle option be the middle position and the far left position on the control be more up and the position on the control to the far right be more down?

 

The more you turn it to the left the more the lights point down, the more weight you put in the back the more you turn to the left. The first position is just on with no light adjustment