'165 switching both fans from the ECM?

[Shannen Durphey]

The secondary fan is controlled through a relay, closed by a temp
switch or by the a/c switch.  The ecm has only an input for this fan.
Shannen

Peter Gargano wrote:
> 
> Shannen Durphey wrote:
> 
> > I can't see any way that the ecm controls the heavy duty fan
> > after looking through the schematics.
> 
> It controls it through a relay - or did I miss something?
> 
> Peter
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