Chrysler 300M 1999 Manual page 435

TEST 10A
REPAIRING CONTROL HEAD ILLUMINATION
Perform TEST 1A Before Proceeding
START TEST 10A.
WITH AN OHMMETER,
MEASURE BETWEEN
GROUND AND THE
GROUND CIRCUIT
(CAV 3). FIG. 1
TURN THE PARK
LAMPS ON.
ROTATE THE DIMMER
SWITCH THUMB WHEEL
AND OBSERVE THE
VOLTAGE.
*Perform Verification TEST VER-2A.
KEY OFF. DISCONNECT
THE A/C-HEATER
CONTROL "C1" HARNESS
CONNECTOR.**
FIG. 1
USING A VOLTMETER,
MEASURE THE PANEL
LAMPS DRIVER
CIRCUIT.
FIG. 1
**Check connectors - Clean / repair as necessary.
425
IS THE RESISTANCE NO
BELOW 5.0 OHMS?
YES
DOES THE VOLTAGE
RANGE FROM BELOW YES
3.5 TO ABOVE 9.0
VOLTS WHEN THUMB
WHEEL IS ROTATED?
NO
REPAIR THE OPEN
GROUND CIRCUIT.*
REPLACE THE BULBS
IN THE A/C-HEATER
CONTROL HEAD.*
REPAIR THE OPEN
PANEL LAMPS DRIVER
CIRCUIT.*
M
A
N
U
A
L
T
E
M
P
E
R
A
T
U
R
E
C
O
N
T
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O
L
S
Y
S
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E
M