NeFaRiOuS_SLE wrote:Here's what you do; pull the handbrake on, start your car with JUST the key... DON'T hold down the brake pedal (habit from driving BMWs where it acts as security so I'd thought I'd make that clear).
Now, start by turning on just the parking lights and see if it turns on then. Once you're done, place your foot on the brake pedal; observe. Then, shift it into reverse, repeat.
Usually the turn signals won't cause the "rear light out" indicator, but rather a quicker-than-usual blinking of the signal lights. Once you've found your culprit, keep in mind that Toyota usually has a "fail safe" type operation, which means that once the primary filament of the bulb burns out, it'll activate the secondary (usu. dimmer).
Example (and I've seen this firsthand on my mom's Camry): Your front left large filament (reserved for signal) burns out. Instead of NOT sending a signal response, it'll send the lighting power to the small filament (reserved for parking light marker). I don't know if this is the case for the taillights, but that's one thing you gotta look out for.
Keep the Handbrake up. Put your parking lights on, put your hazards on and throw it in reverse. Go behind the car and observe. That covers pretty much all the rear lights except for the brakes. Then ask a friend to tap your brake, and check out that all three brake lights are lighting up.
Remember if any filament is out, then the rear light out indicator will turn on. The brake and parking light are in the same bulb, but are two different filaments in those bulbs. If it does indeed redirect to the low filament on the amber bulb if the high filament is out, then if your turning signal filament is out, your blinker may be dimmer on one side, but still blink.