Section 67 (Wiper System & Washer System (Service Information)): Description: Headlamp

WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

An electrically operated headlamp washer system is standard factory-installed equipment on this vehicle when it is manufactured for certain markets with High Intensity Discharge (HID) headlamps. The headlamp washer system includes the following major components, which are described in further detail elsewhere in this service information:

Headlamp Washer Nozzle - A headlamp washer nozzle is secured to the front fascia beneath each front lamp unit.
Headlamp Washer Pump/Motor - The electric headlamp washer pump/motor unit is located in a dedicated hole on the lower, outboard side of the washer reservoir, ahead of the left front fender wheel house splash shield. This high pressure pump is located above and rearward of the reversible front and rear washer pump/motor unit on the reservoir.
Headlamp Washer Plumbing - The plumbing for the headlamp washer system consists of large diameter rubber hoses and molded plastic fittings. The plumbing is routed to the washer nozzles on the front fascia from the washer reservoir. The connections at the headlamp washer pump and the two headlamp washer nozzles feature unique quick-connect fittings.
Headlamp Washer Relay - The headlamp washer relay is soldered onto the Printed Circuit Board (PCB) located within the Power Distribution Center (PDC) and is not serviceable. The PDC is located within the engine compartment near the battery.
Washer Reservoir - A unique washer reservoir is used on vehicles with the optional headlamp washer system, which has dedicated provisions for the headlamp washer pump and plumbing. This reservoir is mounted in the same location and using the same mounting hardware as is used for vehicles without the headlamp washers. The reservoir is concealed between the left inner fender shield and the left outer fender panel, ahead of the left front fender wheel house splash shield. The filler neck and cap are the only visible components of the reservoir and, are accessed from the left front corner of the engine compartment.

Certain functions and features of the headlamp washer system rely upon resources shared with other electronic modules in the vehicle over the Controller Area Network (CAN) data bus. Other electronic modules in the vehicle that may affect headlamp washer system operation are:

Body Control Module - The Body Control Module (BCM) is located within the instrument panel on the driver side of the vehicle. Refer to MODULE, BODY CONTROL (BCM), DESCRIPTION .
Right Multifunction Switch - The right (wiper) multifunction switch is integral to the Steering Column Control Module (SCCM) along with the clockspring and the left (lighting) multifunction switch on the top of the steering column just below the steering wheel. The multifunction switches are connected to a microcontroller within the SCCM. Only the switch control stalks extending from the sides of the steering column are visible, while the remainder of the switches are concealed beneath the steering column shrouds. The right multifunction switch provides all of the driver controls for the headlamp washer system. Refer to MODULE, STEERING COLUMN CONTROL (SCCM), DESCRIPTION .

The BCM and the SCCM each contain a microcontroller and programming that allow them to communicate with each other and other electronic modules in the vehicle using the CAN data bus. Refer to COMMUNICATION, DESCRIPTION .

Hard wired circuitry connects the headlamp washer system components to the electrical system of the vehicle. These hard wired circuits are integral to several wire harnesses, which are routed throughout the vehicle and retained by many different methods. These circuits may be connected to each other, to the vehicle electrical system and to the headlamp washer system components through the use of a combination of soldered splices, splice block connectors, and many different types of wire harness terminal connectors and insulators. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, further details on wire harness routing and retention, as well as pin out and location views for the various wire harness connectors, splices and grounds.