PINPOINT TEST Q: THE BLOWER MOTOR OPERATES CONTINUOUSLY IN HIGH SPEED — MANUAL CLIMATE CONTROL
PINPOINT TEST R: THE BLOWER MOTOR OPERATES CONTINUOUSLY IN HIGH SPEED — EATC
Are the resistances as indicated?
1 and 2 1.4 ohms
2 and 4 1.9 ohms
Test Step Result / Action to Take
Q1 CHECK THE BLOWER MOTOR GROUND
Ignition OFF.
Disconnect: Blower Motor Resistor C293.
Ignition ON.
Place the function selector switch in the floor position and the blower motor switch in the low position.
Does the blower motor speed operate in high speed?
Yes
GO to Q2.
No
INSTALL a new blower motor resistor (19A706). TEST the system
for normal operation.
Q2 CHECK CIRCUIT 261 (OG/BK)
Ignition OFF.
Measure the resistance between the blower motor resistor C293 pin 2, circuit 261 (OG/BK) and pin 3,
circuit 57 (BK).
Is the resistance greater than 10,000 ohms?
Yes
REPAIR circuit 261 (OG/BK). TEST the system for normal operation.
No
INSTALL a new blower motor switch (18578). TEST the system for
normal operation.
Test Step Result / Action to Take
R1 CHECK BLOWER OPERATION
Ignition ON.
Press the override button for MAX A/C operation and rotate the blower motor speed override control fully down.
Does the blower speed reduce?
Yes
The system is functioning normally.
No
GO to R2.
R2 CHECK CIRCUIT 776 (OG/BK) FOR VOLTAGE
Press the OFF button.
Measure the voltage between the blower motor speed control C271a pin 3, circuit 776 (OG/BK) and ground by
backprobing at the connector.
Is the voltage greater than 0 volts?
Yes
GO to R4.
No
GO to R3.
R3 CHECK BLOWER MOTOR SPEED CONTROL INPUT VOLTAGE
Ignition OFF.
Disconnect: Remote Climate Control (RCC) Module C228.
Ignition ON.
Measure the voltage between RCC module C228 pin 24, circuit 776 (OG/BK) and ground.
Yes
INSTALL a new RCC module. TEST the system for
normal operation.
No
INSTALL a new blower motor speed control module.
TEST the system for normal operation.
2003 Taurus/Sable Workshop Manual
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS3H/~MUS~LEN/19/
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