Section 12-00: Climate Control System—Service
1993 Mustang Workshop Manual
DIAGNOSIS AND TESTING

Blower Switch Continuity Test

Refer to the applicable electrical schematic in the Electrical and Vacuum Trouble Shooting Manual (EVTM). Check for continuity between connected terminals as shown on the schematic. Check terminal continuity at each lever position. The light should go on for each connected pair of terminals. There should be no continuity between the battery terminal and the switch case.