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 is a switch on the shifter or trans that turns on the lights when the vehicle is placed in reverse, it is out of adjustment or faulty. And don't forget the bulbs or fuses as a cause.
did you check the reverse switch on the trans ?
Try bypassing the reverse light switch that plugs into the transmission. If your reverse lights come on, voila! Problem solved. Buy a new switch.
First check the bulbs then check the fuses.
The reverse lights automatically come on as you put the car into reverse , if they are not coming on your most likely problem is the fuse or bulbs
Faulty bulbs, faulty switch, faulty wiring, disconnected ground.
check your fuses first, if none are blown, check the bulbs if none are blown, then take it to a shop you've got a wiring issue.
Check the fuses first. Your owner's manual should tell you where they are. Most likely its the fuse. If not, check the bulbs because on some vehicles a bad bulb may break the entire circuit. They are separate circuits, separate fuses and separate swithes. Check the fuse and the tail light bulbs.
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.
u have a short in ur wireing.
Check connections and alignment of the neutral safety switch, located under the dash on the steering column. That switch is what controls the reverse lights. To check operation: With the car engine *off*, have a friend stand so he can see the rear lights, and run the gear selector thru it's full range of motion, chances are the rev. lights will come on, probably when it's in neutral.
There is a switch under brake pedal. This switch controls the brake lights. They some times go bad. Have someone stand behind vehicle while you push on brake pedal, if no brake lights come on. Try pushing the brake switch by hand. Check for power with a voltmeter.