I have already replaced my fuse in my relay box (30A) cause it was blown. What tool do I need to test my 2p contector at the radiator itself? What is this tool called? I asked for a Test Harness at advanced and they had no clue waht i was talking about? What do you guys use to test you relays, stuff like that? I need to buy one to test my fan motor etc.? please help before the part store closes thanks?