Just wiring up a brand new L5108RELVP. Channel 1 seems faulty. pressing the manual toggle switch they all make a "CLICK" sound except the first channel, light comes on but no click. checked with the multimeter as well incase it was a silent relay but no contact change. I assume the relay is faulty. How are they tested in the factory ?? do these relays fail with bumpy transport ? It is good having the removable connectors in these units but they are no use as you need to remove them any way to get them through the holes in the sides. Charles