If the 70 is the same as the 69 & I'm fairly certain that it is, there is a
switch under the dash on the passenger side mounted to the lower part of the
system housing. There should be 2 switches side by side. One is orange, the
other green. The orange operates the compressor, the green is for the
blower. This is something to check out.
John
Peter Engel wrote:
> Does anyone know of a source for very detailed info on the Autotemp
> system as used in a 70 Imperial?
>
> I have been plagued with blower problems for years and finally got
> disgusted enough to deal with it.
>
> I have a spare of each system component and I'm redrawing the factory SM
> schematic to make sense of what is going on. I've even disassembled the
> brain to find out exactly what wire goes where.
>
> I have drawn a schematic of the brain circuit board and it is fairly
> simple (4 transistors, 5 resistors, a capacitor, a trimmer pot, and a
> SIP resistor (I think).
>
> The problem is that I don't remember/know enough about electronics to
> figure out which leg of each transistor does what. Too many variables.
>
> I'd like to add my research project to the website when it's done but
> for now I'm kinda stalled.
>
> Anyone want to help with this aspect?
>
> Pete in PA
>
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