The backup sensor is inside the transmission.
To help you turn your backup sensor on I would need more information. What does the backup sensor go on? What type of vehicle? What year is it? an what model vehicle is it?
The backup sensors are located in the rear bumper. The four circles on the bumper.
One can purchase a backup sensor from a local electronics retailer or through online retailers such as Amazon. Other stores may also stock backup electronic sensors depending on the individual's location.
By restoring part of the backup
back aid not working
how to test crank sensor
Backup sensor
It is in the trans, on the valve body. It is called a trs(trans range sensor).
To test an abs sensor for a Lexus ES you will need to use a multimeter. The multimeter will determine if the abs sensor works or not.
If Your BMW 525I backup sensor still beeps even when the car is in drive, it could be a faulty fuse. It could also indicate a wiring problem.
I find the backup sensor, aka rear sensing system, to be very helpful when: # parallel parking, and # avoiding hitting people, cars and lawn mowers that sneak up behind me when backing out of the driveway.