[Healeys] coil short

[Dr. C. Rubino]

OH, OH, worse than I feared. Most of the white wires to the fuse box have
fused. I may have to cut back to where the fuel pump wire comes out and
replace that wire from there and the wire from the coil. The wire from the
overdrive selenoid is OK. But wait. The wiring diagram shows 3 white wires to
the fuse box but I have 4, any idea what the fourth one might be?

Carl BN-4
1957