SW-EM Smith's Tachometer The Tach is a current sensing type, signified by the I in Smith's Part Number RVI 3410/00. Input (primary of T1) consists of an inductive link (also: "Impulse Loop") only. There is no galvanic connection between input (Ignition of vehicle) and internal circuit of Tach. Smiths Tach wireing - Mini Mania The Volvo tach was designed for negative ground and it appears that its case is conected to the black wire. Therefore, there are only 5 wires instead of 6 as found on the eBay tach. Apart from that and the question of the "2" red wires on the Volvo tach, the wiring is pretty much the same. smithsclassic - GoMoG Smith's Classic Wiring. Smith's Caerbont Tachometer Wiring. Smith's Tachometer Conversion (from RVI to RVC). GoMoG: I have changed the ignition of my 1968 4/4 competition (1600 crossflow) for an electronic ignition system (fitted within the existing distributor) and [PDF] Smiths Tachometer Conversion d2 - GoMoG inside the Smith’s case so smaller donor movements are desirable. It should go without saying, that the donor tachometer should be rated for the same number of cylinders as that of the Smiths unit being replaced. Common Steps for All Conversions: The following section details steps common to all conversions. Smiths Disassembly: smiths tachometer | eBay www›Search›smiths tachometerFind great deals on eBay for smiths tachometer. Shop with confidence. Skip to main content. eBay Logo: Shop by category. Shop by category. Enter your search keyword 1970 Triumph 500 650 Smith’s Tach Tachometer #2 1353 . Pre-Owned. $54. Time left 2d 2h left. 0 bids +$12 shipping. Installation Instructions, Smiths Tachometer - MINI Installation instructions for a Smiths tachometer, for the classic Mini Cooper.