RF FOOTWELL, PANEL OFF, CHECK FOR CONSTANT POWER TO BLOWER REGULATOR, MAKE SURE "REST" IS OFF, IF POWER REMAINS AT REGULATOR CONNECTOR, PROBLEM IS MOST LIKELY ACC PUSHBUTTON UNIT. REMOVE UNIT (USE RADIO KEYS), UNPLUG UNIT. IF BLOWER STOPS PROBLEM IS MOST LIKLEY ACC UNIT. EXPENSIVE PIECE, APPROX. $1000.00. SORRY, I DO NOT HAVE TIME TO CHECK WIRING DIAGRAM. YOUR BEST BET IS TO BRING IT TO SOMEONE QUALIFIED TO DIAGNOSE. THERE IS A MINOR POSSIBILITY OF THERE BEING A SHORT IN THE WIRING HARNESS. (MAYBE THIS IS THE REASON WHY THE PREVIOUS OWNER SOLD THE CAR.)