well i fur plannin on gettin a tach then its juss buy a manual book.....look up the wires...i believe the r is 3-4 wires...one connects to teh rpm reading..12v...ground...and light switch..yuppz 4 wires im pretty shure..but if ur interested in a gauge cluster for a 96+ civic then i have one..its from an ex...but yea if u purcahsed a tach used and dont have instructions let me know and ill look up the wire colors that u need to connect them to
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