Why does the direction indicator meter stop and start and give an erratic indication when my rotor turns?
Contrary to popular belief, this problem is caused by a dissimilar metals problem in the rotor. The rotor pot, which is the sensor for the position indicator, is made of tungsten wire with a copper wiper. The pot shaft is turned by an aluminum housing. This combination causes corrosion to accumulate on the pot, which then causes erratic movement of the meter. The condition can be cured by cleaning the pot every year or two with an old toothbrush and some contact cleaner.
