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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 10-03-2012, 11:19 PM   #11
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Join Date: Oct 2008
Location: East Lansing, MI
Posts: 56
My Ride: 2005 BMW 325xi 5spd.
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Double post for content.

I redid the mod today, and what I did this time was (using the Piezo Siren 273-079 from Radioshack) I soldered a spade connector on the black and red wire of the siren. I also took both of the mating spade connectors that are currently not used, heated up the plastic casing of the connector with the soldering iron, and melted it off - leaving only the metal connector behind. I opened up the now-exposed portion of the currently unused part of the spade connector so I could easily crimp this on the wires on the connector on the car (wow lots of words!) Then behind the connector on the car, I stripped away about a 1/2" of both wires used (respective Hot and Ground connections) and crimped the spade connectors onto those wires. The spade connectors I just crimped were the ones I melted the plastic off. To finish up, I just slipped the spade connectors together and I had a hardwired but REMOVABLE siren that won't fall out in two weeks.

I mounted the siren inside where the connector was. This protects it very well from water. Its a bit quiet this way, but I don't mind. Others may want to add a second 102dB siren 273-079 and mount it in the same fashion. The real advantage of this procedure is you still get a hardwired siren instead of sticking it loosely in a plastic connector, AND you can remove it easily by simply pulling the spade connector apart (well both spade connectors, one on the black wire, one on the red wire).
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