Good mate borken007 advises. And exactly for customers I always connect via a relay. I take one control from the + lights (but I connect to the position) and you can under the passing, and the other wire to the generator excitation wire.
The system works like this.
1. Turn the ignition on excitation and lights you have 0 so LEDs are not lit.
2. You start the engine - +12 v appears on the excitation and the mass is taken through the bulb
3. You start the engine and turn on the lights - on excitation + 12 v on +12 V bulbs the relay turns off and the LEDs go out.
The system checked and very good.
You only need to mount the diode between the relay and the alternator excitation.
The diode is necessary because without the diode when you turn the ignition on (without starting the engine) and turn on the light - p [about excitation will be the mass from the alternator and + 12V from the bulb and then the LEDs will light up. Mounting the diode causes that the system in this particular case will not turn on the leds.
I hope everything is clear, if not, please write.
best regards
