Check that you haven't got the dimmer turned all the way down. If you can't find the dimmer, check your owners manual. You should have everything in this book memorized before you drive the car.
Probably in the shifter wire loose or off.
there is a switch either under the shifter or on the side of the trans that activates the lights when you put it in R. It needs adjustment or replacement
Probably a fuse, check to see if your horn works, really!
check fuses first .
show warning lights and what they mean on 97 Saturn
There are a couple of reasons why a 2005 Saturn Ion's reverse lights will not work. The fuses may be blown or the light bulbs need to be replaced. Fuses and bulbs can be purchased at any auto parts store.
Check to make sure that the brake lights are working - shift interlock and brake lights are a common circuit. Check stop light fuse If the engine is off, there is a small square cap next to shifter. Remove cap and use a screw driver to depress button inside hole where cap was removed. This will unlock the shifter.
Linkage broken or disconnected? Vehicle stuck in "Park"? Check to see if stop lights are working - shift interlock and stop lights same circuit - check fuse
You are supposed to only have to press the brake pedal. Evidentally your brake lights aren't working. You probably need to see if the brake light switch is bad.
fuse #17 in the fuse box located under the rear seat bench
signal lights not working.
The backup lights on a 67 Camaro won't work if the bulbs have burned out of the shifter is misaligned. The lights come on automatically when put in reverse and will not function properly unless the shifter triggers the reverse sensor.