STEERING WIPER STALK CONVERSION
My 87 ate the multiposition/function switch the other day. The
headlight circuit melted the contact wiper holder inside the housing
due to the load. I figured it was time to install the FORD
fix to the lighting power circuit (#15).
        (for you who have not experienced this, the #15 circuit
is the one that carries power for the lights, both headlight
and fog. the wire is too small. the fix is to rewire the circuit
using bigger gauge wire as per FORD tech bulletin 89-17-11)
        The rewire went well. All melted parts (switch and connector
block) were easily replaced. then the op test. NO WIPERS or WASH.
        I checked the wiring to that part of the switch and power
was present. all wiring was intact. then I looked at the new switch.
the new switch (p/n F0ZZ-13K359-B) was a different part number than the
old melted switch (p/n E8ZC-13K359-AA) that I took out of the car, and
different from the part number on the bulletin (p/n E8ZZ-13K359-A).
        AND the contacts for the wiper circuit were physically LOCATED
in different places on the mating area of the connector! After disassembly
of both the new and the old switches, and some work with the ohm meter,
I was able to determine the designations for the new switch. see the
obligatory ascii dwg below.
(NOTE! R1 and R2 could not be determined exactly. but in that they are
just the ends of a variable resistor for the intermittent wipers
I would expect that it doesn't make much difference which is
which) (I hope).
        The connector block that mates with this switch has removeable
contacts, so rewiring the switch was easy. All the slots are
available on the connector block. you just need to relocate the
B+, the W, and the R2 contacts in the block. Everything works now.
but you might want to keep this in mind if you go to do this repair
and you get one of the new switches. they will work if you take
a moment to rewire the connector block.
 ______________________
 |   ___      ___     |
 |   R2       H       |
 |                    |
 |            ___     |
 |            B+      ---------
 |                      R1  |  |
 |                          |  |
 |   | W                       |         OLD MELTED SWITCH
 |   |                         |         CONTACT POSITIONS
 |                             |
 |                    ----------
 |                    |
 |                    |
 |   L          I     |
 |  ___        ___    |
 |____________________|


 ______________________
 |   ___      ___     |
 |   B+       H       |
 |                    |
 |                    |
 |                    ---------
 |                      R1  |  |
 |                          |  |
 |              W  |           |         NEW SWITCH
 |                 |    R2  |  |         CONTACT POSITIONS
 |                          |  |
 |                    ----------
 |                    |
 |                    |
 |   L          I     |
 |  ___        ___    |
 |____________________|

B+  main power into the wiper circuits
H   high speed wipers
L   low speed wipers
W   washer motor
I   intermittent wipers
R1  one end of resistanc ckt for intermittent wipers
R2  other end of resistand for intermittent wipers