air suspension prob

hi December 1999 4.6 petrol. all 4 warning lights came on and then on dash said to drive only at 35 mph. the suspention was at its low point. can i do anthing without taking to dealer as i have had this before and dealer sorrted it but now prob has come back. it can not be taken back to dealer as it was in another area long way from where i am now.
can any one tell me the cable and softwear for sale on ebay to do your owen dose it work and is it easy?

dose any one know if a diagnostic would tell if its the pump or aome other mechanical part or dose the dianostic only tell a electrical problem.

Might be worth taking a look Here - Storey wrote the software and makes cables, and what he doesn't know about the EAS probably isn't worth knowing...

He is also a member on here....