Without being cheekyQuote:
Please do
Quote:
I beg to differ. A 1200 tacho requires 3 wires to operate. Earth, Ignition 12V and Inductive loop.
Now the 12v ign supply terminal is clearly marked on the tacho with a ( + ) symbol, easy
Earth terminal clearly has a metal tab that goes to the housing. ( If one understands electrical principals it is clearly easily recognisable)
Inductive loop terminal has a piece of plastic with a hole through its centre. it has a metal strap over this plastic which has a stud and nut on it just like the other 2 terminals.
One might be led to assume that if an unknowing installer was to connect ignition positive to this terminal, one could actually burn the tacho. Who is to know how one has connected their tacho if they already show signs of missundestanding its instalation?
Quote:I do belive there is no way john could of melted wires with his description of instalation. For example, if wire runs from A to B and finishes at C ( A = power supply eg, Ign 12v. B = load eg, coil positive. C = earth eg, coil negative.) We would have a complete circuit.
If one runs another wire in parallel from A to B whether it is looped through an inductive tacho or not, it would make no difference.
But if someone was to run a wire in parallel from A straight to C whether through an inductive tacho or not, one would soon notice melting wires upon trying to turn over the engine. This would result in a burnt ignition module ( for elec ign ) or melted points and wire ( for points ign)

Though I better clear up the misconceptions.
Cheers Steve