Providing the high beam positive wire is normally off (not sure in this case)
To keep it all legal (can only activate driving light's when high beam's are on)
Just tap into the original high beam power wire at the back of the headlight as the trigger wire for the relay.
Run a wire from the relay's earth terminal back inside the cabin (use an existing firewall grommet) to an on/off switch, then the other side of the switch goes to an earth point, this way you wont have a positive wire running through the firewall
You can also connect a Driving Light on indicator light by running a wire from a positive behind the dash to the light and the earth side connect's where the earth wire from the relay connect's to your switch
30 - Power, Battery Positive via a 30A fuse
86 - Relay trigger, High beam wire at back of headlight
85 - Relay Switched Negative, Driving light main switch on dash, other side of switch to an earth point on the body
87 - Positive power wire to Driving light's
Negative wire from Driving light's to earth
