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Message: <blockquote data-quote="mcgovern61" data-source="post: 190291" data-attributes="member: 59">Back at it again.  I got a chance to connect the fuse/relay panel to the buss bars and I ran power from my battery to the two circuits to test.  I used the 12 volt router power supply to fire the relays and everything works exactly as planned! :yahoo: I was going to move my Stebel Nautilus horn circuit to relay #2 in the fuse panel, but I came across a minor issue.  The horn came with an installation kit back in '07 that is wired directly to the battery with 14 gauge wire, a 30 amp inline blade fuse and relay.  I got a little bit concerned that it came with a 30 amp fuse! :shock: I thought I had better check the amperage draw while the horn (really the compressor) is in operation.  I have an alternator ammeter tool to test current flow that is good to 80 amps.  Just drop it onto the wire and draw some juice.  It is a very sensitive device.  I setup on the power wire coming directly from the battery and blew the horn for 6 seconds or so.  To my surprise, that compressor had a constant 22-25 amp draw on the battery! :shock: Maybe I will leave it hooked as is right on the battery? :BigGrin:</blockquote>