OK, so I have checked it out with all wires connected. For the front right and both rear windows, relays 1 to 4, 7 & 8 all work correctly. When the front left switch is pressed down, relay 6 activates and stays closed, even when the switch is released, I can only release it by physically pushing it open, when it stays open. When the switch is pressed up, nothing happens, relay 5 should close, but it doesn't.