Hi all disco's failed suspension again. Can anyone tell me what the solonoid valve on the actual pump does. I've tested both of the valves seperate from the pump and they open and close allowing air to iether wheel ,but cant seem to favom what the single one does. I can here it click when i energise it but thats about it. Does'nt seem to open exhaust, close or anything. Thinking This could be my problem. I have new bags new sensors and all has been good for some months but yesterday rh side jacked up to off road position while leaving lh side on normal. Leaning was not the word.lol. thought i was some sort of sensor but now cant get the pump to initiate and its down on its arse.