Date: Wed, 30 May 2007 08:55:23 -0400 From: Captain Poutine <captainpoutinenospaml.com> Subject: RE: NG900 hands free kits
As to the factory harness: it seems to be buried in the WIS CD. TSB 300-9017, Jan 1996, describes the built-in wiring: http://www.townsendimports.com/Saab_TSB_Folder/Saab_TSB_pdfs/300_9017.PDF In sum, the 5 pins are: 1 rd Power from fuse 23 2 ye/gy Power from Fuse 17 (keyswitched power) 3 gy/wh from rheostat 16, the panel illumination dimmer 4 bk Ground 5 gy - mute Therefore, it isn't terribly useful. But perhaps necessary, given that most hands-free kits only connect to 4 speakers, and thus we need some way to mute the door speakers. Later models have a slightly more advanced setup which can be modified nicely: http://www.sethevans.com/hack.html (has a nice pinout of the later version of the telephone harness) Given that later models mute is active-low, my guess is that older models are also.
