making a headlight switch?

Just found this online I will try tonight, how does it look?

incase pic doesnt work:

87 to high beam bulb

87a to low beam bulb

86 to ground

85 to one leg of switch

30 to other leg of switch and head light power wire.

The only thing I can think is there is a diode internal of the relay. I know that 85 should be ground, and 86 should be positive in voltage. So if there is an internal diode, since the above is the standard, I would imagine the internal diode would be correct. However, this is the only thing I can see. Try power to 30 and 85, then ground 86 through the switch.