The best two possibilities I can give you is the push buttons on the switch assembly
are dirty or corroded. Doesn't take much to keep them from working. Get another switch from a salvage and try it.
Other than that, the door lock motors are probably bad.
At the front of the engine , towards the drivers side of the engine ( power steering fluid reservoir on a 1998 Mercury Grand Marquis )
Begin by removing the wiring harness from your 1994 Mercury Grand Marquis power antenna. Remove the power antenna retaining nuts. The power antenna will come off.
Into the power steering reservoir.
Yes there Is under the dashboard
The 1988 Mercury Grand Marquis circuit breaker for the power windows can be found in the fuse box. The circuit breaker will be in the first column, third from the bottom.
Fuse or relay defective.
It is part of the power steering pump assembly.
how to replace1994 grand drivers side power window motor
A 1994 Grand Marquis came from the factory with 190 horsepower (if equipped with only a single exhaust setup) or 210 (if equipped with a dual exhaust setup).
There is no "kill" switch on a 1995 Grand Marquis. There is a fuel inertia buttom that when activated stops the fuel from reaching the engine so the car will not go even thought it does have power.
Ford calls for Mercon ATF.
Fuse, loose connection, or the light switch. how do you remove the dashboard on a 94 mercury grand marque?