Chrysler New Yorker. Manual — part 673

TEST NTC-27B

CHECKING RADIATOR FANS

Perform TEST NTC-27A Before Proceeding

FIG. 1

FIG. 2

N

O

T

R

O

U
B

L

E

C

O

D

E

T

E
S

T

S

528

TEST NTC-27B

CHECKING RADIATOR FANS

Perform TEST NTC-27A Before Proceeding

*Perform Verification TEST VER-2A.

**Check connectors - Clean / repair as necessary.

WITH THE DRB,

THE HI SPEED

START TEST ACTUATE THE HI

DID THE HI

SPEED

YES

RAD FAN CHECKS

NTC-27B.

SPEED RAD FAN

RAD FAN ACTUATE?

OK AT THIS

RELAY. TIME.*

NO

KEY OFF, DISCONNECT

WITH A VOLTMETER,

THE RAD FAN MOTOR

MEASURE THE HI SPEED

DOES THE VOLTAGE

YES

CONTINUE TEST

CONNECTOR.**

RAD FAN RELAY OUTPUT

SWITCH FROM 0 TO

NTC-27B ON THE

KEY ON. ACTUATE THE

AT THE FAN.

12 VOLTS?

NEXT PAGE.

RAD FANS.

FIG. 1

NO

KEY OFF, REMOVE THE

KEY ON, WITH A

HI 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 RELAY.

CIRCUIT.*

SEE GENERAL INFO 4.6

FIG. 2

YES

WITH AN OHMMETER,

TO THE RAD FAN

REPAIR THE OPEN HI

MEASURE THE HI MOTOR.

IS

THE RESISTANCE

NO

SPEED RAD FAN

SPEED RAD FAN

BELOW 5.0 OHMS?

RELAY OUTPUT

RELAY OUTPUT FROM

CIRCUIT.*

THE RELAY... FIG.

1 AND 2

YES

REPLACE THE HI
SPEED RAD FAN

RELAY.*

N

O

T

R

O

U
B

L

E

C

O

D

E

T

E
S

T

S

529

TEST NTC-27B

CONTINUED - CHECKING RADIATOR FANS

FIG. 1

N

O

T

R

O

U
B

L

E

C

O

D

E

T

E
S

T

S

530

TEST NTC-27B

CONTINUED - CHECKING RADIATOR FANS

*Perform Verification TEST VER-2A.

**Check connectors - Clean / repair as necessary.

TEST NTC-27B

WITH AN OHMMETER,

CONTINUED FROM

MEASURE THE HI SPEED

IS THE RESISTANCE

NO

REPAIR THE OPEN HI

THE PREVIOUS RAD FAN GROUND

BELOW 5.0 OHMS?

SPEED RAD FAN

PAGE.

CIRCUIT TO GROUND.

GROUND CIRCUIT.*

FIG. 1

YES

REPLACE THE HI
SPEED RAD FAN

MOTOR.*

N

O

T

R

O

U
B

L

E

C

O

D

E

T

E
S

T

S

531