Sonar laser 4000

[Ontario Car Wash]

Anybody got a quick link for the black sonars on a 4000
thanks
i noticed one is not clicking and the rite side is very faint
arch is measuring at start when presoak starts
but once in awhile runs real close to passenger side and also has turned at lic plate
so i replaced the pulse 30mm and fence is good
i feel its the faint signal from the passenger sonar

 

[Ontario Car Wash]

Thanks harrals they were 180$ for the black each