Re: climate control replacement

[ti@amb.org (Ti Kan)]

Fred Munro writes:
> Hmm, interesting, Stephane. These defrost circuits pull a lot of power, so
> there may be a relay somewhere. The switches on a climate control unit are
> not usually very heavy duty. I've never seen a rear window defrost switch in
> the CC head - my '86 5ktq had the switch on the dash from what I recall.

Fred, you must have forgotten, then.  All North American 84 and later
type 44 cars with the GM-sourced climate control have the rear
window defogger switch on the climate control panel.  However, you
are right in that the defogger is a heavy current consumer and there
is a separate relay that activates it.  The switch on the CC is merely
a momentary touch button that tells the CC head to activate/deactivate
said relay.  On most type 44s (except the 1984 non-turbo) this relay
is on the auxiliary relay panel under the dash, the rightmost one on
the bottom row,  This panel is accessible via the little door under the
dash.

On the 92 and later style climate controls (such as on your S4), the
rear window defogger switch is a separate switch on the center console.

-Ti
96 A4 2.8 quattro
84 5000S 2.1 turbo
80 4000 2.0
-- 
    ///  Ti Kan                Vorsprung durch Technik
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