[mikesz]

I think I need to clarify. I have a durametric. when I hook it up and try to test the engine bay fan I can hear the relay clicking but the fan does not go on. I checked the fuse and its good but still fan doesn't go on. when I pull out the relay and use a jumper the fan goes on no problem and runs strong. So why would the fan work fine with the jumper and not using the durametric?