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Hi All, My BA was sold me with no key for the alarm siren, I've decided to swap it out for a $20 aftermarket siren so I will at least have a siren with a key to it. Just wanting to identify the 3 existing alarm siren wires - black, red and white. Just to make things interesting my new siren has 4 wires - black, red, white and blue. Confirmed as - Ground, 12+ constant, + trigger and - trigger.. I wasn't exactly sure how to make 4 wires go into 3 however I was at least hopeful to match up colours and off I go.. Sounded promising when key fobs chirped the new alarm however as much as I enjoyed the alarm siren sounding to my turning signals I.e. Anytime a blinker illuminated.. Did make people think I was a cop car. Maybe ford wanted to keep people guessing, maybe black is positive in this case who knows. In terms of the 4 into 3 issue my options as far as I can see are (once I know which existing wire does what) to either; 1. wire - trigger into earth, or 2. wire + trigger into positive constant. Good times.
