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Connecting Alarm Siren to Door Lock System

Model: Volkswagen Golf Golf IV, MK 4, Golf 4 - Years 1997-2003
Part: Accessory kit

To signal the opening and closing of the vehicle with a clearly recognisable sound, consider installing an alarm siren (for example, one salvaged from a BMW factory alarm as shown in the video) and connecting it through a relay that will power it to sound when the vehicle is opened and closed. Position the auxiliary siren, perhaps above the electric fan assembly, and route the power cables neatly under the cross member, next to the wing area, to reach the battery, then under the wiper motor housing where you will place the relay (it is advisable to note the wiring diagram at the end of the video).

Updated on 19 February 2026 by ScegliAuto

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