Neither bake nor broil is heating. Found that I have 120 v on the side that comes from the board, but 0 v from the relay side. Here is my problem: There only seems to be 18 v coming out of the board to the relay. Is this normal? Further, when I check for continuity between the two black wires on the relay, I have an open connection. My thinking is that this should be a coil and should have resistance. See attached wiring diagram. Do I need a relay or a board or both?