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Some early tachometers are hooked up in a manner completely different from the tachs you buy today. Essentially to install them you do this. Unhook the coil power wire from the fuse box. connect this to 1 terminal on the tack. Run a second wire from the second terminal back to the fuse box. You are done. This is the inline style and if you have a ohm-meter measure the resistance between the two terminals on your tach. If it reads less than 5 ohms then it is this type of tach. Inside there is a heavy wire between the two terminals. It forms a few loops. The tach determines rpm by the induction impulses caused by the operation of the points. If this tach is hooked up like a modern tach, there will be a big spark, and maybe melted wires. The good news is the tach is fine, the bad news is your loom is toast. Chris ------------------------------------------------------------------- Unsubscribe? mailto:type3-request@vwtype3.org, Subject: unsubscribe