There seems to be a discrepancy between the sums of resistances, and I suspect that may be due to measurement error but, in any case, that's how you you can find out what's what with an ohmmeter. Then, two taps would be made in from the two ends, one from yellow to blue and the other from red to brown, with the remainder of the winding appearing as 12.4 ohms between blue and brown. Since you have continuity between all the taps there's only one winding and, assuming it's all made with the same wire, the resistances you've given indicate that the highest resistance, 13.9 ohms from yellow to red, would appear across the entire winding. Next, draw the transformer and plug in the resistances you found according to the relative lengths of the winding they'd occupy. ![]() ![]() First, make a table with the wire colors shown and the measured resistances between them arranged so that there are no crossovers, otherwise it's confusing - for me anyway - to see what's what.
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