It has come to our attention that there is a small error in the schematic that I posted for the 98 during coil test mode so I have updated the schematic drawing so it is correct. It turns out that on the 98 and the 9800 they used a special piece of bare wire (looks like ordinary wire) as a very small value resistor to act as a shunt resistor for the meter circuit. I figured I had better mention this in case someone decides to copy the schematic as originally drawn to try and make a coil tester. We have tried to measure the resistance of the piece of wire but it is too low to measure using an ordinary ohm meter. My educated guess would be that it has value of approximately 0.015 ohms but that is only a guess. I have also attached a picture of the wire as it is located on the model 98 that was documented.
