417-07 Exterior Lighting: Description And Operation (page 26 of 29)

 
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