Hi all, my rear has dropped

I need to do a leak test with soapy water but can't jack the car sins its way to low. Is it possible to pressurize the system to raise the car?

 

Maybe. Depends on why it is too low. Will the compressor run? If so, you can jump the relay to fill the tank. Then jump the solenoid block.

 

Brilliant
How is this done?
Front shocks work normally, only the rear has dropped.
Thanks

 

bump

Enyone please?
I have been driving like this for a month now. the front is still in normal hight but the rear is way to low.
How can I jump the relay to fill the tank?
My guess is that the compressor is broken and I probably have a leak in one of the rear shocks. But I need to confirm before I start spending the money on parts
Thanks