After market camera is not working

[mercman]

the car that i purchased had aftermarket camera on reverse that is not working so i bought a new one and got it installed but it still is not working.

he showed me that its working in the other car

What should i be changing then to make the camera work.

[carmo]

wiring may have been damaged.

[gaffy]

after market products are of good quality but sometimes we are cheated so if you want to install aftermarket camera its best to get it from a good shop.

[deepak]

i thought your car already has camera installed.

[gaffy]

i got a camera installed in my pajero from BMW road sharjah.

[mercman]

bmw road is a good place but to find a parking is hell.

thanks all