Lamps/Lighting - Exterior

LAMPS/LIGHTING - EXTERIOR

WARNING: To avoid serious or fatal injury on vehicles equipped with airbags, disable the supplemental restraint system before attempting any steering wheel, steering column, airbag, occupant classification system, seat belt tensioner, impact sensor, or instrument panel component diagnosis or service. Disconnect 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 precautions could result in accidental airbag deployment.

NOTE: When diagnosing the exterior lighting circuits, remember that high generator output can burn out bulbs rapidly and repeatedly; and, that dim or flickering bulbs can be caused by low generator output or poor battery condition. If one of these symptoms is a problem on the vehicle, be certain to diagnose the battery and charging system, then repair as necessary.

NOTE: A good ground is necessary for proper lighting operation. If a lighting problem is being diagnosed that involves multiple symptoms, systems, or components, the problem can often be traced to a loose, corroded, or open ground.

The lamps and the hard wired circuits between components related to the exterior lighting system may be diagnosed using conventional diagnostic tools and procedures. 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.

However, conventional diagnostic methods will not prove conclusive in the diagnosis of the exterior lighting system or the electronic controls or communication between modules and other devices that provide some features of the exterior lighting system. The most reliable, efficient, and accurate means to diagnose the exterior lighting system or the electronic controls and communication related to exterior lighting system operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.

BACKUP LAMPS





BRAKE LAMPS





DAYTIME RUNNING LAMPS




NOTE: Before performing the following tests, determine whether the headlamp low and high beams operate. If the headlamp high and low beams are also ineffective, diagnose and repair that problem before attempting to repair the Daytime Running Lamps.


FRONT FOG LAMPS





HAZARD WARNING LAMPS




NOTE: Before performing the following tests, confirm whether the left and right turn signals operate satisfactorily. If the turn signals are ineffective or operate improperly, diagnose and repair that problem before attempting to repair the Hazard Warning Lamps.


HEADLAMPS









HEADLAMP LEVELING




NOTE: Before performing the following tests, confirm whether the park lamps operate properly. If the park lamps are ineffective, diagnose and repair that problem before attempting to repair the Headlamp Leveling System.


LIGHT BAR LAMPS




NOTE: Before performing the following tests on vehicles manufactured for markets outside of North America, confirm whether both the park lamps and the low beam headlamps operate satisfactorily. If the park lamps or low beam headlamps are ineffective or operate improperly, diagnose and repair that problem before attempting to repair the light bar lamps.


PARK LAMPS





REAR FOG LAMPS





TURN SIGNAL LAMPS