My bilge pump always worked fine, but now it started playing tricks. <br />I works when I flip it upside down (float switch activates). But does not work from the control switch on the dash board. <br /><br />I have 3 wires running to the pump. I checked all 3 wires with a light tester. Two of the wires are negative and one positive. <br /><br />Is this the way it should be?<br />Any idea why it's not working from the manual switch?<br /><br />Thanks