How do I check if my amk compressor is dead I have suspension fault after 15 seconds of start up I stupidly deflated all with gap iid tool. And it's now on bump stops I attached 12volt to power supply and it does nothing not even a click is there a better way to check compressor

Check under the boot carpet, take the spare wheel out and inspect the compressor - could be a fuse also.

If it is dead you can get a replacement on ebay for £120 and its a easy DIY job to swap it out.

Thank you but mines is a l320 so not in boot