Old (dead) siren has 6 wires - brown, purple/white, black, grey/red, red, white/black.
New siren has 6 wires - brown, orange, red, white/black, red/black, grey/purple.
Any ideas on which wires link to which ?
(Original is on 1986 car, dealer fitted from new)
Abacus Alarms have a free member section, once you register you can downlaod the old Serpistar installation wiring diagramme. It matches mine from 1990 so it could match yours.