Headlamps - High Intensity Discharge

WARNING:

To avoid serious or fatal injury when working on the High Intensity Discharge (HID) headlamp system, be certain to take the proper precautions. The headlamp switch must be in the OFF position. Disconnect and isolate the battery negative cable. There is a risk of fatal injury caused by contact with high voltage used in the HID headlamps. There is a risk of explosion or fire caused by highly flammable materials in the vicinity of damaged HID lighting elements. There is a risk of injury caused by exposure to Ultra Violet (UV) light, a risk of burns caused by high component operating temperatures, a risk of mercury poisoning through glass splinters produced by bursting HID lighting elements. There is also a risk of poisoning caused by inhalation of mercury vapors and by toxic salts and mercury compounds being ingested or coming into contact with the skin. Do not come into contact with parts that are under high voltage. Persons with active electronic implants (e.g. heart pacemakers) must never work on HID headlamps. Wear insulated safety shoes, safety glasses and protective gloves. Remove flammable materials and ensure sufficient ventilation in the working area.

NOTE:

The following table addresses only those components which are unique to the low beam High Intensity Discharge (HID) headlamps. If both the low and high beams of one or both HID headlamps is inoperative, diagnose and repair the halogen high beam before attempting to diagnose the HID low beams. For diagnosis of the high beams or any other features of the headlamp system, refer to the preceding table for HEADLAMPS - HALOGEN .

CONDITION	POSSIBLE CAUSES	CORRECTION
HID HEADLAMP LOW BEAM DOES NOT ILLUMINATE	1. Ineffective or missing lighting element.	1. Test and replace headlamp low beam lighting element if required.
	2. Ineffective high tension cable.	2. Test and replace the open or shorted high tension cable if required.
	3. Ineffective ground circuit(s).	3. Test and repair the electronic ballast module ground circuit(s) if required.
	4. Ineffective feed circuit.	4. Test and repair the electronic ballast module feed circuit if required.
	5. Ineffective electronic ballast module.	5. Replace the ineffective electronic ballast module if required.