[V8] Seat Heater switches

[Cody Forbes]

Why not just a multi-position rotary switch with three or so settings?

-Cody Forbes (mobile)

> On Jan 31, 2015, at 10:27 AM, Nicholas Miller <chance9121 at gmail.com> wrote:
> 
> I think I've seen this in the diagrams.  It states "relay" but it looks
> like a transistor.  This is the item you refer to?  I could get ahold of
> those and replicate it in my car.  The trick is then if the installed
> heater will play nice.  Is it literally a heat sensor that communicates
> back to this relay, or does it just know to vary the current/voltage?
> 
> Either way, understand it may be an all or nothing package.  I don't care
> for my 1-setting Mazda 3 heaters... They are a bit all or nothing.
> 
>> On Sat, Jan 31, 2015 at 6:18 PM, Huw Powell <audi at humanspeakers.com> wrote:
>> 
>> Hi Nick,
>> 
>> In short, what you want to do won't work.
>> 
>> The Audi seat heater switches with multiple heat settings (at least, thes
>> that I am familiar with) depend on a sensor in the seat to measure the heat
>> level.  There is no potentiometer, per se, to simply adjust the current
>> delivered.
>> 
>> You'd need to install the sensor and the control "relay" for each side as
>> well as the switch.
>> 
>> I suspect the control units compare the resistance of the sensor with the
>> resistance set at the switch to turn the heat on and off at the desired
>> temperature.
>> 
>> All the best,
>> 
>> Huw
>> 
>> 
>>> On 1/31/2015 4:51 AM, Nicholas Miller wrote:
>>> 
>>> Hey everyone,
>>> 
>>> Does anyone have some pairs of Heated seat switches around?  I want to
>>> retrofit a few of my cars with these Audi/vw switches, as I have a 1
>>> position button on my heaters for right now.  I'd like to try and retrofit
>>> the Audi switch into the car.
>>> 
>>> Has anyone done this before?  I'm not sure if it will work, but in my head
>>> it should be simple, I'm assuming its Vin, Gnd, Vout, and Backlight Vin,
>>> and the switch operates like a potentiometer.
>>> 
>>> P.s.  The candidates are 2 MX-5s, a Mazda 3, and a Mitsubishi Eclipse.
>>> Cause its cold up here in MN.
>>> 
>>> Cheers all,
>>> Nick
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