Operation; Diagnosis And Testing - Front/Rear Fog Lamp Indicator; Front Lock Indicator Description - Chrysler Vehicle User Manual

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FOG LAMP INDICATOR (Continued)
- ELECTRICAL/LAMPS/LIGHTING - EXTERIOR/
LEFT MULTI-FUNCTION SWITCH - DIAGNOSIS
AND TESTING).
DIAGNOSIS AND TESTING - FRONT/REAR FOG
LAMP INDICATOR
The diagnosis found here addresses an inoperative
front/rear fog lamp indicator condition. Before begin-
ning this test, confirm the functionality of the front
or rear fog lamp system. If no fog lamp system prob-
lem is found, the following procedure will help to
locate an open in the front or rear fog lamp feed cir-
cuit between the fog lamp relay and the instrument
cluster. Refer to the appropriate wiring information.
The wiring information includes wiring diagrams,
proper wire and connector repair procedures, details
of wire harness routing and retention, connector pin-
out information and location views for the various
wire harness connectors, splices and grounds.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE SUPPLEMENTAL RESTRAINT
SYSTEM BEFORE ATTEMPTING ANY STEERING
WHEEL, STEERING COLUMN, DRIVER AIRBAG,
PASSENGER AIRBAG, OR INSTRUMENT PANEL
COMPONENT DIAGNOSIS OR SERVICE. DISCON-
NECT AND ISOLATE THE BATTERY NEGATIVE
(GROUND) CABLE, THEN WAIT TWO MINUTES FOR
THE SYSTEM CAPACITOR TO DISCHARGE BEFORE
PERFORMING FURTHER DIAGNOSIS OR SERVICE.
THIS IS THE ONLY SURE WAY TO DISABLE THE
SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO
TAKE THE PROPER
RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT
AND POSSIBLE PERSONAL INJURY.
(1) Disconnect and isolate the battery negative
cable. Remove the instrument cluster from the
instrument panel. Disconnect the instrument panel
wire harness connector (Connector C1) for the instru-
ment cluster from the connector receptacle on the
back of the cluster housing.
(2) Reconnect the battery negative cable. Turn the
fog lamps on by pulling out the control knob on the
end of the left-multi-function switch control stalk.
Check for battery voltage at the front/rear fog lamp
feed circuit cavity of the instrument panel wire har-
ness connector (Connector C1) for the instrument
cluster. If OK, replace the faulty instrument cluster.
If not OK, repair the open front/rear fog lamp feed
circuit between the fog lamp relay and the instru-
ment cluster as required.
PRECAUTIONS COULD
INSTRUMENT CLUSTER
FRONT LOCK INDICATOR
DESCRIPTION
A front lock indicator is standard equipment on all
instrument clusters, but is only functional on vehi-
cles equipped with the optional off-road package. The
front lock indicator is located near the upper edge of
the instrument cluster, to the right of center. The
front lock indicator consists of a stencil-like cutout of
the words "FRONT LOCK" in the opaque layer of the
instrument cluster overlay. The dark outer layer of
the overlay prevents the indicator from being clearly
visible when it is not illuminated. A amber Light
Emitting Diode (LED) behind the cutout in the
opaque layer of the overlay causes the "FRONT
LOCK" text to appear in amber through the translu-
cent outer layer of the overlay when the indicator is
illuminated from behind by the LED, which is sol-
dered onto the instrument cluster electronic circuit
board. The illumination intensity of the front lock
indicator is one-step dimmable. When the exterior
lighting is turned On, the indicator is dimmed; and,
when the exterior lighting is turned Off, the indicator
is illuminated at full intensity. The front lock indica-
tor is serviced as a unit with the instrument cluster.

OPERATION

The front lock indicator gives an indication to the
vehicle operator of the status of the locker mecha-
nism in the front axle of vehicles equipped with the
optional off-road package. The front lock indicator
can also give an indication when certain faults are
detected in the axle locker system. This indicator is
controlled by a transistor on the instrument cluster
electronic circuit board based upon cluster program-
ming, and hard wired inputs to the cluster from the
key-in ignition switch, the axle lock switch, and the
front locker indicator switch. The front lock indicator
Light Emitting Diode (LED) is completely controlled
by the instrument cluster logic circuit, and that logic
will allow this indicator to operate whenever the
instrument cluster receives a battery current input
on the fused B(+) circuit. Therefore, the LED can be
illuminated regardless of the ignition switch position.
The cluster can illuminate the LED solid, or flash it
on and off at two different rates, slow or fast. The
slow rate is about one flash per second, while the fast
rate is about two flashes per second. The LED only
illuminates when it is provided a path to ground by
the instrument cluster transistor. The instrument
cluster will turn on the front lock indicator for the
following reasons:
• Front Axle Lock Request Input - Each time
the cluster detects ground on the front axle lock
request circuit from the axle lock switch (front axle
lock request circuit ground = front axle lock request
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