My AMR4974 BBUS sounder is dead so looking to wire in a cheapo additional unit. The plan is to also put it to a less accessible spot.
https://www.ebay.co.uk/itm/NEW-Universal-CAR-ALARM-12V-BATTERY-BACKUP-SIREN-LOUD-or-trigger-120db-/140892544935
Can anyone help me with which pin is which on...