Chrysler 300M 1999 Manual page 433

TEST 9A
REPAIRING INCORRECT BLOWER MOTOR SPEEDS
Perform TEST 1A Before Proceeding
START TEST 9A.
KEY ON. USING A
VOLTMETER, MEASURE
EACH OF THE BLOWER
MOTOR DRIVER CKTS
LISTED... FIG. 1
KEY OFF. DISCONNECT
THE BLOWER MOTOR
RESISTOR HARNESS
CONNECTOR.**
FIG. 2
MEASURE THE
RESISTANCE OF THE
CIRCUIT(S) THAT
DID NOT MEASURE...
FROM THE
A/C-HEATER CONTROL
"C2" HARNESS
CONNECTOR...
*Perform Verification TEST VER-2A.
DISCONNECT THE
A/C-HEATER CONTROL
"C2" HARNESS
CONNECTOR.**
FIG. 1
#2 TN LO BLO MTR DR.
#3 LB M2 BLO MTR DR.
#7 LG M1 BLO MTR DR.
#10 BK/TN HI BLO MTR
DRIVER. FIG. 1
USE AN OHMMETER IN
THE FOLLOWING
STEPS.
ABOVE 10.0 VOLTS
IN THE PREVIOUS
STEP...
TO THE BLOWER
MOTOR RESISTOR
HARNESS CONNECTOR.
FIG. 3
**Check connectors - Clean / repair as necessary.
423
IS THE VOLTAGE YES
ABOVE 10.0 VOLTS
ON EACH CIRCUIT?
NO
IS THE RESISTANCE
BELOW 5.0 OHMS ON NO
EACH OF THE
CIRCUITS TESTED?
YES
REPLACE THE
A/C-HEATER CONTROL
HEAD.*
REPAIR THE OPEN
BLOWER MOTOR
DRIVER
CIRCUIT(S).*
REPLACE THE BLOWER
MOTOR RESISTOR.*
M
A
N
U
A
L
T
E
M
P
E
R
A
T
U
R
E
C
O
N
T
R
O
L
S
Y
S
T
E
M