Well, I would say that you need the ammeter is series. I would suggest looking for a blown fuse in your meter. The meter should offer a near-zero impedance on the current setting.however, we are working downstream of the CCS so it may never get a current overload. I must try this on my linestage. All the current ought to pass through the meter ( the LED's will go out ) instead of the valve.
My first suspicion s that yo have blown the meter's some point. Don't fel silly about that. I buy those .25 A fuses in bulk...
regards,
Douglas