Mode Selector Switch Test

Using an ohmmeter, check operation of mode selector switch in each mode door position (vent, bi-level, heat, defrost/heat, and defrost), while applying battery voltage to mode door motor terminals No. 1 and 2. See Figure . As mode door selector arm moves through each mode door position, continuity should exist between mode door terminal No. 10 (ground) and appropriate terminals specified in table. See MODE SELECTOR SWITCH TEST  table. To operate mode door selector arm in opposite direction, reverse battery voltage to mode door motor terminals No. 1 and 2. Replace mode door motor if it does not test as specified.