Galaxy Parking Sensors

[Steve2469]

Hi All

I am in the process of trying to fix my parking sensors on a 2007 1.8 tdi Galaxy and there are a few things I am trying to find out if anyone out there can help.

Both my front and rear sensors dont work, had it on a ford diagnostic system and it tells me front left two are out and rear right two are also not working.

I removed the working ones from the front and  fitted them in the rear to replace the broken ones there. The rear still do not work!

 

1   should the rear sensors work if one of the front ones is broken?

2  do these sensors make a clicking sound like earlier models ? ( I dont hear clicking coming from any of them )

3  does anyone know if the sensors can be checked out using a volt/ohm meter

4  does anyone know where I can buy a cheaper alternative to ford sensors

 

Any help at all would be appreciated 

 

Steve