Diagnosis And Testing - Headlamp Washer System
To avoid serious or fatal injury on vehicles equipped with airbags, disable the Supplemental Restraint System (SRS) before attempting any steering wheel, steering column, airbag, Occupant Classification System (OCS), 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 SRS. Failure to follow these instructions may result in accidental airbag deployment.
Before attempting to diagnose the headlamp washer system, confirm whether the front washer system operates satisfactorily. If the front washer system is ineffective or operates improperly, diagnose and repair that problem before attempting to repair the headlamp washer system. If the front washer system operates satisfactorily and the headlamp washer pump/motor unit operates, but both headlamp washer nozzles do not dispense washer fluid on the front lamp unit lenses, inspect the headlamp washer plumbing for pinched or leaking hoses and fittings. If the headlamp washer pump/motor unit does not operate, check the headlamp washer system fuse.
The hard wired headlamp washer system circuits and components may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds. For proper wire repair, and connector repair procedures. Refer to WIRE SPLICING or REMOVAL or INSTALLATION .
However, conventional diagnostic methods will not prove conclusive in the diagnosis of the headlamp washer system or the electronic controls and communication between other modules and devices that provide some features of the headlamp washer system. The most reliable, efficient and accurate means to diagnose the headlamp washer system or the electronic controls and communication related to headlamp washer system operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.