LR3/Disco 3
The high mounted stop lamp is located in the upper tailgate. The stop lamp housing also provides location for the tail door
window washer jet.
The lamp comprises a plastic housing with a red coloured lens. The lamp is illuminated by a number of Light Emitting
Diodes (LED's).
The high mounted stop lamp is activated, along with the tail lamp stop lamps, when the ignition switch is in the ignition
position (II) and the brake pedal switch is active (by depressing the brake pedal).
The high mounted stop lamp and the stop lamps can also be activated by the ABS when Hill Descent Control (HDC) is
active. A signal from the ABS module energises a relay which supplies power to the stop lamps. For additional
information, refer to
Anti-Lock Control - Traction Control
(206-09A )
TRAILER LIGHTING
Several different types of trailer socket can be fitted to the vehicle depending on market specifications. Refer to the
Electrical Reference Library for specific socket details.
The CJB monitors the turn signal lamps and can detect if more than two lamps are fitted (the side turn signal lamps are
not monitored). When a trailer is detected, the trailer warning indicator in the instrument cluster will flash in
synchronisation with the turn signal indicators.
If one or more of the turn signal lamps on the vehicle or the trailer are defective, the trailer warning indicator will not flash
to alert the driver to the bulb failure.
DIAGNOSTICS
The diagnostic socket is located in the lower instrument panel closing panel, on the driver's side, below the steering
column. Various lighting system functions are monitored by different systems which can store fault information. This can
be retrieved using T4 or other suitable scan tool.
AFS Control Module Fault Monitoring
The AFS control module has the capability to monitor faults within the AFS and the dynamic headlamp levelling system.
The control module can store Diagnostic Trouble Codes (DTC's) relating to the symptoms shown in the following table.
Item Part Number
Description
1
-
High mounted stop lamp
2
-
Housing
DTC Symptom Description
Customer Symptom
Possible Cause
LH or RH AFS actuator -
Communication failure
Swivelling does not function
Open circuit or short circuit
to earth
LH or RH AFS Actuator failure
Swivelling does not function
Open circuit or short circuit
