I'll sort the wiring out first, then do the A/C test. See what problem is, as you say it could still be the reg/rec that is duff. Hoping it was the wiring. I have another reg/rec which I thought was off a 4tx. It has one extra wire off it though than my 3vd one so not sure it will work. 3 yellows, a black and a green.
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The black and the green wires might be for the pick up coil.Â