Did you disconnect the white & red secondary wires when you ran the test?
You should, as something may be "loading" it down.
If there is not any measurable voltage on the disconnected secondaries, then it sounds like the transformer is toast.
As a final check, with the power disconnected from the transformer, measure the secondary coil resistance.
White to red. Red to red.
If they show open, then that is what they are.
I am assuming that the fuse is good & the on/off switch is good.
A cute way to test that is to measure the resistance at the power plug.
If the fuse is good & the switch is good, you will be reading the resistance of the primary.