Alternator excitation and the resistance
Everything is great with my Defender (1990 200Tdi) except the alternator. The alternator works if I spin it up enough, cross my fingers and hope that it self excites. Usually somewhere along my trip the alternator starts charging at high 14 volts. Strangely enough, the charge light never goes out. This leads me to believe that the sense wire coming off the alternator to the bulb is missing causing the voltage to never equal out on both sides of the bulb. Looking at the wiring diagram for this circuit, I assume that this is how it works as the circuit never really goes to ground through the bulb.
I can't seem to find any pictures of the wiring for this charge circuit behind the dash. I'm trying to return the wiring on my truck back to stock, as the PO's mechanic was definitely not an electrician. I'd appreciate any pictures of the stock dash wiring for the charge circuit that anyone has.
If I can't find the wire to fix the issue, has anyone had luck jumping a resistor across the terminals on the alternator. If so, what resistor did you use?