I would suspect the connections at the drivers door switch. Make sure they are tight and clean. Most switches can be removed without removing the door panel. Mark
Check the fuses.
Why?
First, you can remove wheels and loot at the observation windows (you will be able to see pads through the windows.) Second, when you have to because you breaks are not working properly: you have to press it really hard, or the car is shaking when you are pressing breaks and so on.
The 2003 Toyota Camry is 5 ft. 10.7 in. (70.7 in.)1 one-touch power windows wide.
The 2012 Toyota Camry is 5 ft. 11.7 in. (71.7 in.)1 one-touch power windows wide.
The 2002 Toyota Camry is 5 ft. 10.7 in. (70.7 in.)1 one-touch power windows wide.
The 2007 Toyota Camry is 5 ft. 11.7 in. (71.7 in.)1 one-touch power windows wide.
The 2013 Toyota Camry is 5 ft. 11.7 in. (71.7 in.)1 one-touch power windows wide.
The 2008 Toyota Camry is 5 ft. 11.7 in. (71.7 in.)1 one-touch power windows wide.
The 2004 Toyota Camry is 5 ft. 10.7 in. (70.7 in.)1 one-touch power windows wide.
The 2005 Toyota Camry is 5 ft. 10.7 in. (70.7 in.)1 one-touch power windows wide.
The 2006 Toyota Camry is 5 ft. 10.7 in. (70.7 in.)1 one-touch power windows wide.