MikeL

Does anyone have a pinout for the rear defrost switch (6 pin)? TIA!

kday

<img src="http://ultrameta.home.comcast.net/swturbocool/wiring.png">

MikeL

Thanks Kev. I'm building your aux.input box and wanted to use a matching switch.

kday

It has a built-in ~10 minute timer. So you'd get 10 minutes of mp3s and then have to hit the button again.

A fog light switch would be better. Best would be to somehow trigger the relay automatically when your aux device is turned on. I did that, but in my case I had an "amp remote" line on the mp3 head unit. Maybe there is a suitable signal on the iPod harness.

kday

There is a signal on the dock connector that could be used to trigger the relay, but you would need a transistor to get enough current.

Some info <a href="http://ipodlinux.org/IPod_to_T%26A_remotecontrol_adapter#Short_descript ion_of_the_iPod_Dock-Connector">here</a> on the dock connector.

Run pin 18 to the gate of a FET, use the drain of the FET to switch the ground side of the relay coil. Presto!

MikeL

part #4A0 941 503 (also took it apart to check)

switch with timer circuit is
#4A0 941 503F