Are the wires numbered on coil pack?

No. There are no numbers on a coil.
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On the 4.0 L - V6 Ford engines the coil pack towers are numbered :
coil---3---4
pack--2---6
plug---1---5


I respectfully disagree - on a certain aspect of coils and numbering: there has to be numbering of some sort to distinguish one port from another. It may be true there are no numbers, in a literal sense, printed on the coil itself.


That leaves a person with having to distinguish #1 from 2, etc, in some other method.


That's what the 'text-drawing' above is trying to establish: there is a wire connection plug in 1 corner - from the point of beginning, count across the row of three ports, 1 -2 -3, and then the bottom row is 5 - 6 - 4 (yes, it is a fractured sequence).


For much more about firing orders, cylinder numbers, coils and getting the wires properly connected, check out the "Related Question" below.

While that question was written to the Windstar, the information is fully applicable to a great number of Ford / Mercury products out there today.