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