Light Control Rheostat: Echo
Remove light control rheostat. Using DVOM, measure resistance between rheostat terminals. See Fig 1. With rheostat turned all the way to the left (off), Continuity should not exist. Gradually turn rheostat clockwise. Resistance should drop from 10 k/ohms to zero ohms as rheostat is turned from DARK to LIGHT positions. If resistance is not as specified, replace light control rheostat.