When the clutch goes out how do you know if it's the clutch cable or plate?

have someone step on the clutch for you and see if the "folk" moves. if it does you'll know the cable is working fine.you may want to check the cable adjuster mounted on the pedal itself.a simple test to do and find out if the clutch plate is worn out. turn your vehicle on put it in gear and just let go of the clutch (with out hitting the gas)if the vehicle stays on your clutch disc is slipping and needs to be replace.if the vehicle dies obviously the clutch is ok.