Bad bulbs or brake light switch.
If the bulbs and fuses are fine, it must be your brake light switch attached to the arm on your brake pedal.
AnswerThe bulbs for the brake lights are usually separate from the normal tail light bulbs. Check and replace the brake bulbs first, and if they are still not working examine the fuses, switch and wiring.
The brake lights are a separate circuit from the other lights. Check the fuses and bulbs. If fuses and bulbs are okay I would suspect the brake light switch is at fault.
Bulbs may be blown.
you could have possibly bought the wrong bulbs and/or fuses. or when you were replacing them you may have damaged the wires. Also the reverse light switch may be defective.
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.
Start with checking the bulbs, then the fuses. In most vehicles the brake lights and siganal lights and running lights are separate circuits. If the fuses and bulbs check okay check the wiring feeding the rear of vehicle.
Likely to be the brake light switch on the pedal at fault if the bulbs and fuses are good and other lights work ok.
If all the fuses and bulbs are new and work properly, the lights could be malfunctioning due to a short in the wiring. The wiring may also be damaged or burned out in places.
Does it have trailer light wiring also? check that too.
Check the backup light switch.
The dash light dimmer switch is turned off or broken.
Check bulbs Check stop light switch Also make sure you have the right bulbs model 2057 bulbs.
the lights seem to run for 3 days then they blow a fuse when i have tested all bulbs they are ok
The light switch.
They probably aren't grounded.
faulty brake light switch (on pedal)
Brake light switch on the brake pedal is defective
Go to AutoZone and look up your fuses in a book for the make and model.
check your ignition switch.
The 2002 Cavalier has a reverse light switch. The switch can be bad, or have a loose connection causing the lights not to work.
How about a malfunctioning brake light switch
check bulbs with meter. check to see if connectors are loose on light. short in wire leading to lights. check fuses.