When it is energized, there should be no pressure at the outlet. Pressure applied at the inlet should be seen at the outlet. For a normally open solenoid, the opposite is true. Once energized, you should see pressure at the outlet. Pressure should be applied to the inlet, and if it is normally closed, you should not see pressure at the outlet. The testing of on/off solenoids is straightforward. These solenoids cannot regulate pressure and will apply full pressure to the outlet.As transmissions and shift strategies have become more complex, they have been replaced by regulating solenoids. These solenoids were the primary used as shift and torque converter clutch solenoids in early applications.They are designed to handle that amount of current indefinitely. Continuous current through these solenoids is around 0.4-0.7 Amps.If you measure the resistance, it is usually greater than 10 ohms.
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