Before testing, touch the test leads together. The meter should read zero or close to zero. If it reads a number, for example 5 ohms, then you will need to subtract 5 ohms from each reading.
With the ignition off, disconnect the solenoid harness from the controller. Measure the resistance of all solenoids.
The TCC On/Off solenoid should be 12-28 Ohms.
The TCC PWM solenoid should be 7-20 Ohms.
Earlier transmissions won't have this solenoid, so checking it will show an open circuit. (50k - ∞)
The EPC solenoid should be 3-6 Ohms.
Shift solenoid 1 should be 12-28 Ohms.
Shift solenoid 2 should be 12-28 Ohms.
For 1996 and up, the 3/2 downshift solenoid should be 12-28 Ohms.
For 1995 and earlier, it should be 7-20 Ohms.