That depends on what is broken. Seriously, diagnostics of an electrical system like the seat heaters is beyond what we can cover here. You need to follow basic diagnostic procedures, tracing the system and checking at accessible points to see if electricity is getting to the heating element(s).
I have not tried to install a seat heater. Assuming that you have a seat with heater that you wish to use, Subaru tends to not include the wiring unless that option was ordered from the factory. You will need to install all wiring up to the fuse panel.
Sure.
The light in the switch can not be changed, the whole switch would need to be replaced.
The power seat on a 2001 Subaru Outback can be fixed by replacing the motor or fuse. The wires may also come loose over time which must be re-seated.
2 front, 3 in the rear seat; limited by number of seatbelts
Put the seat belts on.
Under the carpet where the front seat passenger puts their feet.
Under the carpet where the front seat passenger puts their feet.
There are round knobs on the top of the seat backs on each side. Pull up on one and the push the back of the seat forward.
To repair a seat heater on a 2004 Buick LeSabre, disconnect the connector and check for voltage. If there is no voltage, replace the switch. If there is voltage, check for an open circuit.
The Electronic Control Module is located under the carpeting at the front seat passenger's feet.
Inside the Fuel Tank, accessible through an service hole cover under the Rear Seat.