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Yes, if the relay was stuck it would drain the battery.
Could be a number of things. Check the fuse first. If that's OK, make sure your battery is strong enough to power the seat motors. If that's OK. check for disconnected or broken wiring under the seat. Finally it could be a burned out or defective electric motor, or a relay.
try lubricating the motors and seat sliders, when the motors face too much resistance they draw more amps and overheat, which may lead to a tripped fuse.
in trunk near tire under carpet aiso the relay is there
Most cars with electric powered seat adjusters have no way to adjust them manually. That said, their may be some exotic brands that have both, and some have only an electric drivers seat and a manual passengers seat.
The fuel relay is located in the back of the rear seat. Open the Trunk, remove the cover from the trunk the cover the back of the seat. and there is your trunk relay.
The switch is located under the seat
it should be under the seat where the seat motor is located.
The relay for the heated seats are under the back seat in on of the fuse boxes...check the diagram inside the cover for the proper location.
Power seat relay location for 1996 Blazer
In the fuse box under the rear seat. Pull the seat up from the front (2 clips behind each of the front seats) and remove. Don't forget about the seat's electrical connector on the passenger side if you have heated read seats. The fuse box in on the drivers side of the vehicle. The 'Run' relay (position number 3) is the heated seat relay.
UNDER THE DRIVER SEAT