Dakota 2WD V6-3.9L VIN X (1997)
Daytime Running Lamp Control Unit: Description and Operation
GENERAL INFORMATION
The headlamps on vehicles sold in Canada, will go on when the ignition is turned ON. The module must also receive a signal from the engine
controller. This provides a constant Lights On condition while the vehicle is rolling. The lamps illuminate at less than 50 % of normal intensity.
CIRCUIT OPERATION
On vehicles built for sale in Canada, the low-beam headlamps operate when the ignition switch is in the RUN position and the park brake switch
OPEN.
Circuit L20 from the headlamp switch connects to DRL module. Circuit L20 is HOT at all times and protected by a 15 Amp fuse located in the
Power Distribution Center (PDC).
The ignition RUN feed is provided on circuit L10. This circuit is protected by a 15 Amp fuse located in the junction block.
Circuit L4 powers the low beams of the left and right headlamps. When the headlamp switch is OFF, the DRL module powers the low beams on
circuit L4. When the headlamps are ON, the multi-function switch powers the low beams on circuit L4.
Circuit L3 feeds the high beams of the headlamps and connects to DRL module. When the operator flashes the headlamps with the stalk of the
multi-function switch, the DRL senses voltage on circuit L3. When it senses voltage on circuit L3, the DRL module stops supplying power to the
low beams on circuit L4.
The park brake switch input is provided on circuit G11.
Circuit Z1 provides ground for the DRL module.
