If no click then I think you have a bad diode and are going to wind up having to replace the whole unit. In order to work the relay needs a ground to energize the coil and move the arm. My thinking is that the 2.61V wire is supposed to go to ground and activate the relay. But there a bad diode (basically a one way switch) allowing voltage to leak back up the ground and keep the relay open.
Inspect the little circuit board that the 2.61v wire is connected to. Look at both sides. Are there any dark brown or burnt spots on the board? If possible can you post a close up picture of both sides of the board?
So I've definitely heard a click when I turn on the generator, but I have to wait for someone's help to test if it clicks on or off when plugged into shore power, I'm pretty sure it doesn't but I'll make sure. So by replacing the whole unit, do you mean the little blue automatic output relay or the entire progressive power system?
