What year? If it's a gen 5, there's a video on youtube that inadvertently deals with the switch. It's here:
For gen 6, however, I'm not sure.
For either one, I don't think you necessarily need the schematic, so that youtube video should help. At least I hope it did.
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Lunar Mist 2003 Camry LE 2AZ-FE; 65,400 miles
OEM Spoiler | painted engine cover | plasti-dipped emblems | painted fuse box cover | carbon HVAC controls | blacked out chrome accents | window tint 35% front 20% rear | TRD performance air filter | gen 5.5 SE grille