Does someone understand what the light green/red wire does? I know this is the exciter wire. But I do not understand why there are two options (see chart below):
- wiring with switched 12V
- wiring with bulb/resistor in parallel (or just a resistor without bulb)
My voltage drops from 12V to 9V after the resistor (without running engine, just key on ignition). Can this be the root cause for the failure? The big difference in voltage keeps the alternator fully charging the battery, even if it is near fully loaded. I also had the impression, that the alternator takes a lot of torque from the engine, when cold or at idle.
I measured the resistance of around 400 Ohm. That is near the recommendation... But I don't think that a regular idiot light has such a big voltage drop. Did I mess something up and do I have the wrong resistor?
If I remove the resistor there is still around 0,1V less on the exciter wire than on the battery itself. Is this voltage drop enough and can I leave the resistor away?
Do I need a new alternator in any way?
Sorry... wiring, DC electrics, AC electrics... that is all devils work.