http://www.oreillyauto.com/site/c/detail/BWD0/R3018.oap?pt=01839&ppt=C0111
This is how it is wired. The power input, 56, should come from a normal on/off relay triggered by the headlight switch. Jump 56 to 30. The signal is"S" and 56a and 56b are for hi and lo lights.

Most of the circuits for the engine are started and wires run. The lighting will take some time and lots of wire.