It’s easy enough to test the winding resistance of the solenoids, just by taking measurements at either the 16-pin plug on the back of the transmission (which also tests the integrity of the internal wiring loom)







or at the ECU (which tests the integrity of the vehicle wiring loom too).









This is certainly worth a go, but there’s more that can go wrong with a solenoid than just the winding resistance, so it will certainly indicate a fault but not confirm that the solenoid is operating properly.

Phil