Hi replaced faulty rev camera with same one ,when fitted it will not show on screen .what to do to fix it

When you select reverse what happens - do the reversing lights come on?

Is the fault the same as the reason you changed the camera? if so the problem lies elsewhere.

Hopefully you have a 12v tester - a Fluke multimeter or similar

As the camera should only come on when the reverse gear is selected it could be the wire isn't going live when reverse is selected - does this come from the head unit or another source?

If the camera is being fed power when reverse is selected it could be the feed isn't working, so checking that cable would be another area.

Lastly is the head unit itself may be the issue - check the connections are Ok and is there any menu functions that enable or disable the reverse camera?

Edited yesterday at 08:43 AM1 day by Gamith
to add a note about head unit connections