914 driving lights, Installing OEM type driving lights to a 1974 914 Options

[Jezibel]

I have a '74 914-4 that did not come with the optional driving light set and wish to add them to my car. The 73-76 914s came with pre-installed wiring exiting from behind the front bumper, from my understanding, that would allow lights to be added simply by installing and connecting them.

My car seems to have these wires, as expected, but due to paint overspray effects, the wire colors have been obscured, making it hard to determine which is the brown GND wire and which is the black (+) wire.

I'd appreciate any help available advice from others who have retroactively installed the accessory (OEM type) driving lights to their cars. This might simplify my efforts considerably.

Also, my car's horn was removed and I wish to install a set of the HELLA OEM type dual-tone Superlouds. Again, the wiring is oversprayed by body paint, so any way to quickly determine what wire is the brown GND and (+) power wires for the original (now removed) horn? Is the original horn relay located on the engine-bay relay tray or somewhere else on the car?

Thanks.[font=Verdana]