My old diodes are not working I need to find some more. Written on the diode is IN4007 GW, the diodes are part of a circuit board that contains 4 relays and 4 diodes. The board is at the rear of my 4WD, its for a caravan or trailer lights, when turning on the indicators the feed is going into the board and i can hear the relays clicking, when i put a screw driver to each relay to hear which one is working, I found that they were all clicking together. Hence the check on the diodes, they all give the same reading when conecting my multimeter, in both directions. Which does not seem correct. The car is 12v made in Germany. Any thoughts on my diognosis and where to get the new diodes from. Regards Tucy.