After my original stopped working, I orderd a Westach hourmeter from A.S.
Supply.

It does not work and before I send it back, thought I might check my
troubleshootinmg logic G as it seems unlikely I'd get a bad meter.

In plane: confirmed ground and hot leads installed properly on meter
backside and actually had a ground and a +. After 1.3 hours flight, reading
is zero!

In hanger: disconnected planes leads from meter and connected a ground and a
+ from an external battery. After 20 minutes, no reading (still zero).

What am I missing?
Thanks, Dick