Lincoln 2006 Town Car Workshop Manual page 40

2006 Town Car Workshop Manual
Is voltage present?
N5 CHECK THE BLOWER MOTOR SPEED CONTROL CIRCUITS FOR A SHORT TO
GROUND
Ignition OFF.
Measure the resistance between blower motor speed control:
C1308-1, circuit 260 (RD/OG) and ground.
C1308-2, circuit 752 (YE/RD) and ground.
C1308-3, circuit 754 (LG/WH) and ground.
Are the resistances greater than 10,000 ohms?
N6 CHECK THE BLOWER MOTOR SPEED CONTROL CIRCUITS FOR SHORTS
Measure the resistance between blower motor speed control:
C1308-1, circuit 260 (RD/OG) and C1308-2, circuit 752 (YE/RD).
C1308-1, circuit 260 (RD/OG) and C1308-3, circuit 754 (LG/WH).
C1308-2, circuit 752 (YE/RD) and C1308-3, circuit 754 (LG/WH).
Are the resistances greater than 10,000 ohms?
N7 CHECK THE EATC MODULE HIGH BLOWER OUTPUT
Connect: EATC C228a.
Connect: Blower Motor Speed Control C1308.
Ignition ON.
Adjust the blower motor speed to HI.
Measure the voltage between EATC module C228a-8, circuit 754 (LG/WH) and
ground by back-probing the EATC module C228a.
Is the voltage within 2 volts of battery voltage?
N8 CHECK THE EATC MODULE BLOWER CONTROL OUTPUT
Adjust the blower motor speed to LO.
Measure the voltage between EATC module C228a-16, circuit 752 (YE/RD) and
ground by back-probing the EATC module C228a.
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS6G/~MUS~LEN/19/...
Yes
GO to N6.
No
REPAIR the affected circuit for a short to ground. TEST the system for normal
operation.
Yes
GO to N7.
No
REPAIR the affected circuits for a short together. TEST the system for normal
operation.
Yes
GO to N8.
No
GO to N9.
Yes
INSTALL a new blower motor speed control. TEST the system for normal operation.
No
GO to N9.
Page 40 of 45
12/30/2011