Behr A/C blower switch wiring

[Tsingtao_1903]

I am attempting to rebuild the Behr A/C system on my '72.  I am stuck at the A/C blower switch.  I have four wires:  brown/green, blue/green, black/white and black/white.  I can't understand the Behr wiring diagram.  Which wire goes where?

 

TIA

[ray_]

I was gonna show you mine. But it doesn't help

 

But this may  http://www.2002tii.org/behrac/behr_ac_install.pdf

 

Page 16.

 

 

[Mike Self]

If you didn't figure it out from the diagram, I did a column on this after a friend and I puzzled over one for some few hours while replacing the switch.  PM me and I'll send you a copy of the column.

 

The A/C and heater switches are interconnected so that you can't turn the heater blower on when the A/C is running, and vice versa.  This is not the case with Frigiking units.  That may be what's puzzling you.

 

mike

[Tsingtao_1903]

I stared at the wiring diagram on and off for a good part of the day.  I am starting to understand it .  Will poke it with my hand held meter and trace the wiring later tonight.

[Tsingtao_1903]

I finally figured out the Behr wiring diagram with the help of my hand-held meter.  Below is a picture for posterity.  The blk/wht wire at the bottom goes to the resistor on the evaporator body.  My A/C blower switch only has four posts and the one black wire going to the temperature sensor.  I've been advised that the Behr A/C is disabled if the heater blower is on and vice versa.  In my '72, both can be on at the same time.  Don't know why and don't want to know.  

 

(I started my career with Western Electric.  We put No-Ox-Id on everything).

Edited April 11, 2017 by Tsingtao_1903

[ray_]

I need to save that pic for... one day! 

 

 

Cheers,

[fjord-tii]

Bringing back this thread as I am now wiring my Behr A/C with only a partial wiring harness. The fan control switch, 17 in the schematic, I have seems to be a click-less rheostat. Is that correct? What resistance readings should I see between pin 4 and the other pins?