rear park sensors not working

[boardrider]

hi there, i am a new disco3 owner ( second hand) the rear parking sensors d
ont work. the car has a kaymar bar fitted,should these come on automatically with reverse,i have checked the fuses and appear good,any help would be appreciated
boardrider

[connock]

G day Boardrider
If you can see them on the bar at the back and they ARE fittet. you could check that they are pluged in , plug behind LH tail light assembly. Might sound silly but they may never got plugged in when bar was fitted.

connock