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[Les H]

G'morning Thomas. There are two ways that a wrong connection could be made. That is to connect the HIGH o/p coil or the LOW o/p directly across to the COMMON connection/wire.....Whatever coil is connected in that way will have its maximum self induced current flowing though itself and maybe at high revs would produce enough current to heat up and cause damage. However, the alternator’s output only rises to a high figure as the revs increase so at lowish revs the current flowing through the short would be within the coils maximum rated current capacity and would be sustainable and would not damage it. Soby keeping the revs low initially, one would have a decent window of opportunity in spotting something was wrong if a mistake had been made. This would hold the same for either the High or Low o/p’s as the Low o/p will short one set of coils and the High o/p set (double the current) would feed current through two sets in parallel so there is no difference in current flowing in any set of coils. As long as the COMMON output wire is never cross connected directly to any of the other two output wires, there is no other way you can mix things up, so you need to be sure of the common wire. The common output wire must always be taken directly to the rectifier. For identification of it, the measurement show quite clearly there is only ONE common connection where we get two lowish resistance readings. There is also only one way of connecting the coils where we get a distinct high reading and like this, the common wire is the one that has been left out. This same common wire on the other two measurements of the pairs is clearly seen by observation. As a final check, by carefully examining the stator’s soldered connection to the lead-out wire that is soldered to three enamelled coil-wires (one end of 3 sets of coils) then you have absolute certainty that no mistake has been made.