Either the switch that turns the backup lights on is out of adjustment, or has failed in the on position.
for the tail lights all the other lights are working blanking lights brake lights and reverse lights but no tail lights on both side
Check the fuses first then check the bulbs.
1 reverse light and 1 tail light
This usually means a bad or wrong bulb in the tail lights
The white parts of the tail lights are the reverse lights.
In the back should be tail lights which always come on when the headlights or parking lights are on, and stoplights which come on whenever the brakes are pressed. The stoplights should be brighter than the tail lights, but they should be separate.
On the back of a car there are tail lights, turn signals, and brake lights. Cars also have back up lights that tell people when the car is in reverse.
To change the reverse lights on a Suzuki Aerio SX, first, ensure the vehicle is turned off and parked safely. Open the trunk, then locate the tail light assembly on the side where the reverse light needs replacement. Remove the screws or clips securing the tail light assembly, pull it out gently, and disconnect the wiring harness. Finally, remove the old bulb from the socket, replace it with a new one, reassemble the tail light, and test the reverse lights to ensure they function correctly.
Remove tire and inner fender well and change it from there. Other option is to remove the licence plate and reverse lights,reach through to the tail lights.
bulb number for taillights are 2057 on a 1991 civic dx.
1977 Chevy pickup brake lights not wordking but turn, tail,reverse allworks
In those tail lights there is a circuit board. If it goes bad it will cause all kinds of problems.