The DRL system does not need to be "activated", it is automatic and turns the lights on at reduced power whenever the engine is running with the park brake off. If the lights you are looking at are down low in the bumper at each corner, these are fog lights. There is a switch just below the headlight switch. Some Mercury models required you to pull out on the headlight switch. Check the owners' manual for proper operation.
Inside the engine compartment by the passenger strut tower
This car does not have daytime running lights.
yes it does
do 1998 ford f450 have day time running lights
daytime running lamps
where dose daytime running lamp module go on92 mercury grand marquis need to replace one
If you mean daytime running lights, then probably not unless it's from Canada.
where is the running light sensor on a 2003 grand marque
It should be 30-35 psi with the engine running.
As soon as the engine is started and the emergency / parking brake is released the daytime running lights are supposed to come on
As far as I can determine, only the Canadian models have a DRL system. There isn't much info on it in US repair manuals. I own a 1994 Canadian Villager. On my vehicle, the module is screwed onto the passenger side strut tower, right behind the cruise control servo. Not sure if the 1998 models are the same, but should be pretty similar.
30- 32 psi engine running, 36-40 psi key on engine off.