How to test the resistance of the 4L60E transmission solenoids without dropping the pan, and while the transmission is still connected to the vehicle. You'll need a separate pigtail connector and a digital multimeter. The test does not fully conclude that the solenoid is good, it can still leak. These tests are great for solving those solenoid circuitry data trouble codes. Solenoids tested in this video: 1-2 Shift Solenoid, 2-3 shift solenoid, 3-2 shift solenoid, torque converter clutch solenoid, TCC PWM Solenoid, electronic pressure control solenoid, and transmission fluid temperature sensor.