PINPOINT TEST S: NO OPERATION IN HIGH BLOWER SETTING — MANUAL CLIMATE CONTROL
Is the voltage greater than 4.5 volts?
R4 CHECK THE BLOWER MOTOR SPEED CONTROL
Press the MAX A/C button blower motor speed override control fully down.
Without disconnecting the blower motor speed control C271a from the blower motor speed control, use a fused
jumper lead to connect pin 3, circuit 776 (OG/BK) to ground.
Does the blower motor operation stop or decrease substantially?
Yes
GO to
R5
.
No
INSTALL a new blower motor speed control. TEST
the system for normal operation.
R5 CHECK CIRCUIT 776 (OG/BK) FOR AN OPEN
Ignition OFF.
Disconnect: RCC Module C228.
Ignition ON.
Measure the resistance between the blower motor speed control C271a pin3, circuit 776 (OG/BK) and the RCC
module C228 pin 24, circuit 776 (OG/BK).
Is the resistance less than 5 ohms?
Yes
INSTALL a new RCC module. TEST the system for
normal operation.
No
REPAIR circuit 776 (OG/BK) for an open. TEST the
system for normal operation.
Test Step
Result / Action to Take
S1 CHECK THE BLOWER MOTOR GROUND
Ignition OFF.
Disconnect: Blower Motor Resistor C293.
Place the blower motor switch in the high position.
Measure the resistance between the blower motor resistor C293 pin 2, circuit 261 (OG/BK) and pin 3,
circuit 57 (BK).
Is the resistance less than 5 ohms?
Yes
INSTALL a new blower motor (19805). TEST the system for normal
operation.
No
GO to
S2
.
S2 CHECK CIRCUIT 57 (BK)
Disconnect: Blower Motor Switch C294a.
Measure the resistance between the blower motor switch C294a pin 3, circuit 57 (BK) and ground.
Yes
INSTALL a new blower motor switch (18578). TEST the system for
normal operation.
No
REPAIR circuit 57 (BK). TEST the system for normal operation.
Page 43 of 47
2003 Taurus/Sable Workshop Manual
11/22/2011
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS3H/~MUS~LEN/19/...
