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Old 07-30-2011, 04:40 AM
locry's Avatar
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Join Date: Nov 2003
Location: Philippines, ...recently submerged, AGAIN
Posts: 1,011
AC Push button control unit... disected

I've recently installed an in-dash evap/blower combo in place of the original evap/housing/blower on my w124...
the switch that came with the unit is a simple rotary 3 speed unit.

I want to be able to control the AC from the original push button control unit so I decided to open up the control unit itself...
It seems simple enough... I can isolate the illumination circuit and disable everything else, I will just use the switches themselves and eliminate the PCB circuitry altogether...
the pushbutton units themselves are like this:

there are 6 legs per unit... anyone know which is which?

I plan on using the 3 fan speed buttons as speeds 1,2 and 3
and 3 of the main buttons as ON, ECONOMY, and OFF

thanks guys


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Old 07-30-2011, 10:45 AM
sjh sjh is offline
Join Date: Oct 2009
Posts: 580
Probably DPDT (double-pull, double-throw).

Take a continuity tester (Ohm meter) and you'll know.

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