With Daytime Running Lights (DRL)

Depending on the outside light conditions, the Daytime Running Lights (DRL) Module automatically operates either the Headlights or the Headlights and Front/Tail Lights. The gear selector must be out of "PARK/NEUTRAL" (Automatic Transaxle) or the Park Brake must be released (Manual Transaxle). The DRL Module operates in two modes:

^ In the Day Mode, the HI Beam Headlights are lit at a reduced brilliance.
^ In the Night Mode, the LO Beam Headlights are lit at full brilliance and the Front Marker, Park and Tail Lights are lit.

When the Photoresistor senses high ambient light, the DRL Module operates in Day Mode. The Day Mode contacts close, applying voltage to HI Beam Headlights through CKT 593. The HI Beam Headlights are lit at a reduced brilliance.

When the Photoresistor senses low ambient light, the DRL Module operates in Night Mode. The Night Mode contacts close, applying voltage to the LO Beam Headlights and other Exterior Lights through the same circuit path as when the Headlight Switch is in "HEAD."

The Fog Light Switch receives battery voltage from the TAIL LPS Fuse. With the Headlight Switch in "PARK" or "HEAD," battery voltage is applied to the Fog Light Switch through the INST LPS Fuse. With the LO Beam Headlights on and the Fog Light Switch "ON," battery voltage is applied to the coil of the Fog Light Relay. The Fog Light Relay coil receives its ground signal through the DRL Module. The relay is energized, and voltage from Fusible Link E is applied to the Fog Lights through the Fog Light Relay contacts. If the HI Beam Headlights are turned on, battery voltage is applied to the HI Beam Input of the DRL Module. The DRL Module removes ground from the Fog Light Relay, and the relay is de-energized, removing battery voltage from the Fog Lights.


PHOTORESISTOR INPUT

The Photoresistor is a light-sensitive variable resistor. Its resistance decreases as outside light intensity increases. The DRL Module measures the voltage drop across the Photoresistor and determines whether it should operate in Day Mode or in Night Mode.


PARK/NEUTRAL INPUT (Automatic Transaxle)

The DRL Module has an input from the Electronic PRNDL Control Module circuit. When the gear selector is in "PARK/NEUTRAL," ground is applied to the DRL Module DRL Disable Input. The DRL Module then will not operate any Headlights or Exterior Lights (in Day or Night Modes.) This allows the operator to start the car and keep the Headlights off as long as gear selector is in Park/Neutral.

Once the DRL Module turns the Daytime Running Lights on, putting the gear selector back into "PARK" or "NEUTRAL" will not turn the Daytime Running Lights off.


PARK BRAKE INPUT (Manual Transaxle)

The DRL Module has an input from the Brake Warning Indicator Control Circuit. When the Park Brake is set, ground is applied to the DRL Module DRL Disable Input. The DRL Module then will not operate any Headlights or Exterior Lights (in Day or Night Modes.) This allows the operator to start the car and keep the Headlights off as long as Park Brake is applied. Because the Park Brake Switch shares CKT 33 with the Electronic Brake Control Module and the Brake Fluid Level Switch, any condition that causes the BRAKE Indicator to come on will also inhibit the Headlights from operating in Daytime Running Lights mode.

Once the DRL Module turns the Daytime Running Lights on, setting the Park Brake again will not turn the Daytime Running Lights off.