If the car horn sounds, this means the ECU has lost connection to the siren and as a failsafe, it sounds the car horn, assuming it has been deliberatley tampered with in attempt to disable the siren.
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Tek-Emo Villis Emo Bis
V70 SE NAV 1.6 D2 2015MY POWERSHIFT, D4162T, 93000miles, RED.
/VOL FCR/PEPER OBD2/Acron 9135 OBD2/L.E.D Flasher/VDASH/ANCEL BA301/Topdon Top Scan
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