Repairing Control Module (Head) Illumination - Chrysler 300M 1999 Manual

TEST 18A

REPAIRING CONTROL MODULE (HEAD) ILLUMINATION

Perform TEST 1A Before Proceeding
START TEST 18A.
THIS PATH REPAIRS
THE BACKGROUND
LIGHTS.
WITH AN OHMMETER,
MEASURE BETWEEN
GROUND AND THE
GROUND CIRCUIT
(CAVITY 3). FIG. 1
TURN THE PARK
LAMPS ON.
ROTATE THE DIMMER
SWITCH THUMB WHEEL
AND OBSERVE THE
VOLTAGE.
*Perform Verification TEST VER-2A.
DISCONNECT THE
AUTOMATIC
TEMPERATURE
CONTROL HARNESS
CONNECTOR.**
USING A VOLTMETER,
MEASURE THE PANEL
LAMPS DRIVER CKT.
FIG. 1
**Check connectors - Clean / repair as necessary.
195
IS THE PROBLEM
ONLY WITH THE YES
LETTERS AND LED
LIGHTS?
NO
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
REPLACE THE
AUTOMATIC
TEMPERATURE
CONTROL HEAD.*
REPAIR THE OPEN
GROUND CIRCUIT.*
REPLACE THE
AUTOMATIC
TEMPERATURE
CONTROL HEAD.*
REPAIR THE OPEN
PANEL LAMPS DRIVER
CIRCUIT.*
A
U
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O
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A
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N
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Y
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