Join Date: Sep 2013
Location: West Des Moines, IA
Re: Heater control wiring - two yellow wires (67 w/AC)
After getting to my wiring harness and heater / AC control unit, I found that a brown 14 and yellow 16 go to the temperature lever actuated blower switch. (I'm working on getting pictures posted, but having problems with my scanner). Anyway, does your speed selector switch (off, low, med, hi) have a brown 14 wire going to it along with a yellow 16, light blue 16, and an orange 18?
If it does, someone has already removed a yellow 16 from the multi connector to the speed selector switch and placed the brown 14 where the second yellow 16 was. That will leave two yellow 16 wires in the vicinity of where these two switches are supposed to be on your Nov. '66 harness.
All the yellows in this harness are the same wire. Just cap off your two yellow spares, or trace them into the harness and clip them at the solder and crimp joint (again, pictures are coming). Hope this helps.