Lighting and Horns: Description and Operation

LAMP SYSTEMS
Each vehicle is equipped with various lamp assemblies. A good ground is necessary for proper lighting operation. Grounding is provided through a separate ground wire.

When changing lamp bulbs check the socket for corrosion. If corrosion is present, clean it with a wire brush and coat the inside of the socket lightly with Mopar Multi-Purpose Grease or equivalent.

HEADLAMPS
Headlamps on the Durango are modular in design. The turn/park lamp module is incorporated into the headlamp module. The module contains four bulbs; a dual filament headlamp bulb, two dual filament turn/ park bulbs, and a side marker bulb,

Headlamps and parking lamps are controlled by the headlamp switch. The multifunction switch mounted on the steering column controls the high beam function, and the turn signal function.

HEADLAMP SWITCH
The headlamp switch is located in the instrument panel, outboard of the steering column. It closes a path to ground for the Central Timer Module (CTM) when the park or head lamps are ON and the driver door ajar switch is closed (driver door is open). The headlamp switch opens the ground path when the headlamp switch is turned OFF. The ground path is also opened when the driver door ajar switch is open (driver door is closed).

The headlamp switch controls the parking lamps and the headlamps. A separate switch in the module controls the interior lamps, and instrument cluster illumination. This switch also contains a rheostat for controlling the illumination level of the instrument cluster lamps.

The headlamp switch has an OFF position, a parking lamp position, and a headlamp ON position. High beams are controlled by the multifunction switch on the steering column. The headlamp switch cannot be repaired. It must be replaced.

DAYTIME RUNNING LAMP MODULE
The Daytime Running Lights (Headlamps) System is installed on vehicles manufactured for sale in Canada only. A separate module, mounted on the cowl, controls the DRL.

The headlamps are illuminated when the ignition switch is turned to the ON position. The DRL module receives a vehicle-moving signal from the vehicle speed sensor. This provides a constant head- lamps-on condition as long as the vehicle is moving. The lamps are illuminated at less than 50 percent of normal intensity.

TAIL/STOP/TURN SIGNAL/BACK-UP LAMP
The Tail lamps on the Durango are mounted at the rear of the vehicle, outboard of the rear hatch and integrated into the lines of the vehicle. The tail lamp module contains a housing, lens, and three bulbs. Dual filament bulb is used for tail, stop, and turn signal operations. A separate bulb is used for back-up illumination.

Tail lamp functions are controlled by the headlamp switch. Turn signal operations are controlled by the multifunction switch. Stop lamp functions are controlled by the stoplamp switch. The back-up lamps are controlled by the back-up lamp switch on the transmission.

INTERIOR LIGHTING
The courtesy lights are controlled by the CTM. The door switches are inputs to the CTM and the courtesy lights are outputs. The glove box lamp and the ash receiver lamp (if equipped) are not controlled by the CTM. They are hardwired to individual switches and fuses.

The highline CTM also provides for illuminated entry option. If the CTM detects an unlock signal from the RKE transmitter, a door key cylinder switch input or the door jamb switch input, the interior courtesy lights will be turned on. The illuminated entry function is canceled if the CTM senses an ignition "ON" condition or the "lock" command from a valid key fob.

If a door is left open or turned on by rotation of dimmer switch for more than fifteen minutes, the CTM will extinguish the lamps to avoid discharging the battery. If the lamps are turned on by courtesy lamp switch, the CTM will not be able to turn them OFF.

The Durango utilizes an interior light defeat switch as an integral part of the headlamp switch.