SAAB Alarm Wiring for Microscan 424

Page 1 | Page 2 | Page 3 | Wiring Instructions | Installation Pictures

Alarm Wire Colour Function SAAB Loom wire colour New wire colour Connect to: Notes
Black Antenna -- -- -- --
Black Ground -- Black -- Connect to ground under rear seat
Red 12V+ NOT fused Grey Red IGNITION / 30 Connect to ignition switch loom, in centre console – also connected to Immobiliser Relay (see below)
Grey Output to indicator Blue/White Grey -- Connect using Scotchlok connector to loom under rear seat
Grey Output to indicator Red/White Grey -- Connect using Scotchlok connector to loom under rear seat
Red/White Ignition sense Green/White Red IGNITION / 15 Connect to ignition switch loom, in centre console
Yellow Output to window/sunroof interfaces (Negative when armed) -- -- -- Connect to Window I/F Orange
White Siren Output -- Purple/White -- Route via centre console & through firewall to siren mounted on inner wing
Brown Negative trigger (when doors, tailgate or bonnet opened) -- Brown Bonnet Switch See below
    Brown/Black Brown 53 / 2 53 = Interior light switch in centre console
Orange/White Timed 30 second negative output when disarmed – -- -- NEW RELAY / 86 See below

Immobiliser Relay

-- 12V + IGNITION -- Red/White ALARM / RED  
-- Switched contact Grey/Red Brown Fuel Pump Connect to existing loom under rear seat, using shrouded bullet connectors, wrap in heatshrink
-- Switched contact Grey/Red Brown Fuel Pump supply circuit Connect to existing loom under rear seat, using shrouded bullet connectors, wrap in heatshrink N.B Cut fuel pump supply wire between brown wires!
-- -ve Trigger -- Yellow Sunroof I/F Pink
 

Bonnet switch

Wire Colour Function SAAB Loom wire colour New wire colour Connect to: Notes
Brown Grounded when bonnet is opened -- Brown Alarm Brown Route via centre console

Power Window I/F

Red 12V+ Fused Grey Red IGNITION / 30 Connect to ignition switch loom
Black Ground -- Black -- Connect to ground under rear seat
Yellow -ve trigger -- Orange -- Connect to Alarm Yellow
-- Cascade –ve trigger -- Pink -- Connect to Sunroof interface Orange
-- LH Window Switch UP Red/White Brown 163/2 163 = Passenger window switch
-- LH Window Motor UP Red/White Blue --
NB: Cut wire to window winder
-- RH Window Switch UP Red/White White 287/1 287 = Window relay for driver’s door – under rear seat
-- RH Window Motor UP Red/White Green -- NB: Cut wire to window winder

Sunroof I/F

Red 12V+ Fused Grey Red IGNITION / 30 Connect to ignition switch loom
Black Ground -- Black -- Connect to ground under rear seat
-- -ve trigger -- Orange -- Connect to Power Window I/F Pink
-- Cascade –ve trigger -- Pink -- Connect to Immobiliser relay Yellow
-- Sunroof Switch CLOSE Red Brown Roof Switch
 
-- Sunroof Motor CLOSE Red Blue Roof motor  

Siren

Red 12V+ NOT FUSED   Red Battery +12V NB: Connect to Battery 12V at distribution block (RH wheel housing), or at Main Fusebox #29
Black Ground -- Black -- Connect to suitable nearby ground
White Trigger -- Purple/White (Purple lead close to sounder) -- Connect to Alarm White
Blue Not connected -- -- --  

Piezo Sounder 

Red 12V+ -- Red Battery +12V Connect to Siren +12V via 5A inline fuse
-- -ve -- Green Microwave Sensor Green Connect to green wire on microwave sensor via firewall

 

Interior Light Relay (new relay, mounted under rear seat)

Wire Colour Function SAAB Loom wire colour New wire colour Connect to: Notes
Red 12V+ Grey Red IGNITION / 30 PIN 85 Connect to ignition switch loom
Orange/White Trigger –ve -- Orange / White   PIN 86 Connect to Alarm Orange/White
Black Ground -- Black -- PIN 30 Connect to ground under rear seat
-- Interior lights –ve Blue Green 53 / 1 PIN 87 connect to Interior light switch in centre console (Pin 1)

Central Locking

Purple/White LOCK Yellow Purple/White 175 / 1 175 = Central Locking Control Unit under instrument lower panel RHS
Purple UNLOCK Green/White Pink 175 / 2  
Green Ground -- -- -- Connect to ground under rear seat
Green/White Ground -- -- -- Connect to ground under rear seat

Driver’s door lock motor

-- LOCK Purple Purple/White -- Connect from 175/7 to door lock motor in driver’s door
-- UNLOCK Brown/White Brown/White -- Connect from 175/8 to door lock motor in driver’s door

Status LED

Red RH Door LED -- Pink    
Red LH Door LED -- Pink    
Black Ground -- Black    

Manual lock/unlock switch in centre console

-- Ground -- Black    
-- Lock Yellow Yellow    
-- Unlock Green/White Green/White    

Page 1 | Page 2 | Page 3 | Wiring Instructions | Installation Pictures