2001 nissan sentra (released in the phils) reverse or back lights dont work..This car has 4 reverse lights. Left, right and two in the middle (near the plate number).When i put the car in reverse, only the middle reverse lights work. The left and right reverse lights dont work at all. I have checked the bulbs and they are functioning well...

I can provide the radio wire colors and each function of the wires by color. 2001 Nissan Sentra Car Stereo Radio Wiring Diagram
Car Radio Constant 12v+ Wire: Pink
Car Radio Switched 12v+ Wire: Blue
Car Radio Ground Wire: Gray
Car Radio Illumination Wire: Red/Green
Car Stereo Dimmer Wire: Red/Yellow
Left Front Speaker Positive Wire (+): Pink
Left Front Speaker Negative Wire (-): Blue
Right Front Speaker Positive Wire (+): White
Right Front Speaker Negative Wire (-): Black
Left Rear Speaker Positive Wire (+): Light Green
Left Rear Speaker Negative Wire (-): Violet
Right Rear Speaker Positive Wire (+): Blue
Right Rear Speaker Negative Wire (-): Pink

You have a bad ground on the left side. Use a jumper wire on the ground wire near the socket on the left side. If the lights start to work normally than trace the ground wire back to its body connection and repair

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Take a few minutes to make sure you dont have a blown fuse....Run through them with your test light...

Dont worry about the colors.
Just be sure of the position of the connections.The wires pulled off the light go right back on the light in the same position they came off.

Its actually not that bad to change. If you open the glove box and remove the screws then the screws along the bottom of the glove box at the bottom of the dash the box will slide out. Remember to disconnect the light if it has one. Now you will be able to see the underside of the dash. You can see a large black box that has wires and vacuum lines all over. You need to locate a small flat plate with two screws and a plug in the middle. Disconnect the plug and remove the screws. The resistor will come straight out. The back side will look like small coiled up springs of different sizes. Install in reverse.Hope this helps. Good luck. Please re-post with updates. Thanks cj2176.

If you are looking for the OBD2 connector , is located under the dash left side of steering column near the hood release handle.

The flasher is in the middle of the dash up behind the audio unit. Why are you replacing this part, I have never seen one of these fail on a Sentra.

I have a 1999 Nissan Sentra that is smoking from the passanger side of the car's hood. It stops when I turn the air conditioner off

HI
IT WAS NOT A DEFAULT PROBLEM
MAY BE THERE IS A LOSS OF CONNECTION OR IT WAS BURN LIGHT ??

there shoul be a two wire sensor on the side of transmission make sure sensor is by passing power with ignition on and reverse aplyed if not replace back up sensor or switch