Chrysler New Yorker. Manual — part 672
TEST NTC-27A
CHECKING RADIATOR FANS
Perform TEST NTC-1A Before Proceeding
FIG. 1
FIG. 2
N
O
T
R
O
U
B
L
E
C
O
D
E
T
E
S
T
S
524
TEST NTC-27A
CHECKING RADIATOR FANS
Perform TEST NTC-1A Before Proceeding
*Perform Verification TEST VER-2A.
**Check connectors - Clean / repair as necessary.
START TEST
IS THERE A
YES
REPAIR ALL RAD FAN
NTC-27A. RADIATOR
FAN RELAY
RELAY FAULT
FAULT CODE?
CODES.*
NO
WITH THE DRB,
ACTUATE THE HI/LO
DID THE HI/LO
YES
SPEED RAD FAN
SPEED RAD FAN
NO
KEY OFF, DISCONNECT
WITH A VOLTMETER,
THE RAD FAN MOTOR
MEASURE HI/LO SPEED
DOES THE VOLTAGE
YES
CONTINUE TEST
CONNECTOR.**
RAD FAN RELAY OUTPUT
SWTICH FROM 0 TO
NTC-27A ON THE
KEY ON. ACTUATE THE
CKT AT THE RAN FAN
12 VOLTS?
NEXT PAGE.
HI/LO SPEED RAD FAN.
CONNECTOR. FIG. 1
NO
KEY OFF, REMOVE THE
KEY ON, WITH A
HI/LO SPEED RAD FAN
VOLTMETER, MEASURE
IS THE VOLTAGE
NO
REPAIR THE OPEN
RELAY.**
THE FUSED B(+) CKT
ABOVE 11.0 VOLTS?
FUSED B(+)
AT THE RELAYS.
CIRCUIT.*
SEE GENERAL INFO 4.6
FIG. 2
YES
WITH AN OHMMETER,
TO THE RAD FAN
REPAIR THE OPEN
MEASURE THE HI/LO
MOTOR.
IS
THE RESISTANCE NO HI/LO SPEED RAD
SPEED RAD FAN
BELOW 5.0 OHMS?
FAN RELAY OUTPUT
RELAY OUTPUT FROM
CIRCUIT.*
THE RELAY... FIG.
1 AND 2
YES
REPLACE THE HI/LO
SPEED RAD FAN
RELAY.*
N
O
T
R
O
U
B
L
E
C
O
D
E
T
E
S
T
S
525
TEST NTC-27A
CONTINUED - CHECKING RADIATOR FAN OPERATION
FIG. 1
N
O
T
R
O
U
B
L
E
C
O
D
E
T
E
S
T
S
526
TEST NTC-27A
CONTINUED - CHECKING RADIATOR FAN OPERATION
*Perform Verification TEST VER-2A.
**Check connectors - Clean / repair as necessary.
TEST NTC-27A
WITH AN OHMMETER,
CONTINUED FROM
MEASURE THE LO SPEED
IS THE RESISTANCE
NO
REPAIR THE OPEN LO
THE PREVIOUS RAD FAN GROUND
BELOW 5.0 OHMS?
SPEED RAD FAN
PAGE.
CIRCUIT TO GROUND.
GROUND CIRCUIT.*
FIG. 1
YES
REPLACE THE RAD
FAN MOTOR.*
N
O
T
R
O
U
B
L
E
C
O
D
E
T
E
S
T
S
527
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