If you mean the sensor it is on top of the dash in the middle closest to the windshield, it's a little globe looking thing.
no one knows.it's a mystery!
Diode or module??? the module is under the dash straight back from the gas pedal..
The DRL Module is located at the LH Rocker Panel left of the brake, under and just below the dash. The DRL Module and the DRL Relay are side-by-side.
The daytime running lights module on a 2000 Grand Marquis is located in the passenger side engine bay. It lays between the battery and the heater blower.
A ( Daytime Running Light ) module
A DRL module controls the daylight running lights found on many newer and Canadian cars.
I believe that is a defective DRL module
The drl module on chevy epica 2004 is back to the data link connector
The DRL control module is located under the steering column on the left hand side!
You probably need a new DRL module and/or DRL relay.In some instances the module is fixible.
DRL modules are like fuses...they are inexpensive, & usually replaced, not repaired.
The drl relay is located in the back of the glove compartment.