will 169 Report post Posted December 15, 2006 A question to you alarm gurus out there. I have fitted a M60B Mongoose alarm to one of my cars. E30 325i Pin 4 is listed as "ground when armed". What is this for? (no hints in the booklet with the alarm) I have not connected it to ground and the alarm is functional. I suspect it is used for some ancillary equipment?? What should I do with it...??? Leave it disconnected from ground as I have done?? Will Quote Share this post Link to post Share on other sites
jochen 4 Report post Posted December 16, 2006 >> Pin 4 is listed as "ground when armed". What is this for? (no hints in the booklet with the alarm) This pin will be high when unarmed, and grounded when armed. It'll be used to switch on various accessory sensor inputs like interior motion sensors etc. If you are not adding any more sensors, leave it disconnected. Quote Share this post Link to post Share on other sites
will 169 Report post Posted December 16, 2006 Thanks, thought as much. But good to have confirmation. Will Quote Share this post Link to post Share on other sites
