Rear junction box?

 

Thank yo

 

There isn't one, it's controlled by a high side driver in the RSJB.

 

Thank you
i guess if i have no live to the compressor it will probaly be a fault in the rear fuse/juction box ?

 

Well I'd not expect it to be live all the time, only when the system decides to run the compressor, it generally waits until you're doing just over 30mph ( so you don't notice any noise from it ) and then runs it if the pressure in the reservoir is lower than desired - and even then it probably only turns the output on if the automated checks for open/short circuit at ignition on time passed.

What problem do you have with your air suspension?
Have you read the fault codes with something that reads full 7 digit codes from all modules?

 

As I won't be around much if at all tomorrow, I thought I add.
If the car is at normal height, but you get a air suspension message on the dash when you reach around 30mph and have the code C1A20-64, then it's quite likely the compressor has failed ( or at least the seal on it's piston has ). See https://www.jaginfo.org/posts/2843843/

 

Compressor replaced as no working . Did 40 miles and all good then yesterday light back on and code B143D-11 power supply

 

That code if for short to ground.
What make and model of pump did you buy?
I suggest you unplug the compressor, and the black connector on the rear junction box ( circled in green in my post I linked above ). Then use a multimeter to test resistance between there and battery negative, it should be "infinite" i.e. open circuit. Also check the resistance between the pump contacts while it's disconnected, given the 380W rating of the pump I estimate that should be somewhere in the range of 0.4-1 ohm.

 

AMK BIL10-309483

 

When I first fitted the pump it all worked. Pumped the suspension up to show room mode and then settled down to the right height

 

When I first fitted the pump it all worked. Pumped the suspension up to show room mode and then settled down to the right height