Driving light wireing

In some of the later model vehicles they switch negative rather than the positive side.

The easiest solution is to wire the driving light relay coil across the high beam element on the existing headlights, but beware funny things can happen if the headlight bulb blows.

Leigh

Some vehicles use negative switching, looks like this is one of them. If you connect a relay coil across those 2 wires you will get your signal.

Rosss
Common Japanese practice is to use earthing headlights. It seems that is what you have.

Most people on forums talk of a trigger wire. I like to regard it as a feed wire for relay coil purposes.
If you connect the relay coil wires across to the two wires which run the headlight filament, then the relay coil will come on when the neg to switch side of the headlight filament is connected to neg by the stalk switch. Have a switch somewhere in that line so you can kill the relay but retain the headlights high beam operation.

I would say what you think is power on the yellow/red wire when on low beam is nothing and the indication your getting on your test light is the positive through the globe making it look like that wire is positive when really it's a switched negative wire.

If you have wired up more sets of driving lights then you care to remember you would know a relay needs a negative and positive signal to work..... If the relay sees two positive signals the relay will not switch until it sees a positive and a negative.

Don't forget the make sure pin 30 and 87 are used the right way and make sure you do the same for pin 85 and 86 (one is positive and the other negative)..... If not you will blow the high bean/ headlight fuse.

Well done everyone for basically repeating the first response and adding your own little bits to try and seperate yourself from it. Good work.