Stock Alarm Wiring Diagram
 

Does anybody have a wiring diagram of the stock car Karr Alarm? I need to find out which wires connect to the horn so I can disconnect the horn and replace it with a siren. I just dont like the honking sound....

Please help!!!

Should be a white wire and a ten amp fuse in line. Be advised that you will probably need to change the polarity to positve output for your siren. if the wire isn't white, then it will be the wire that goes to the steering column that is attached to a green with yellow stripe wire. According to alarm program. You might also consider adding a siren as well as the horn nonking to dram more attention tocar if a forced entry is attempted.

I havent checked the wiring yet but, What do you mean by changing the polarity to positive(probably something simple)? This sounds complicated. I thought I would just cut a wire and connect the siren. Do you think its worth it to pay $20 to get this done? It would be nice if I learn.

Thanks!!!

If you want to learn that is great. if $20 with siren not a bad deal, if you are intent on doing it pm me I 'll give you my number and I will walk you through it. Bill Turner

hey i found this hope it helps

Scion XB
| 12V|wht/blu and wht/red |+ |ignition harness |
| STARTER|black |+ |ignition harness |
| IGNITION|black |+ |ignition harness |
| SECOND IGNITION|black/yellow |+ |ignition harness |
| ACCESSORY|blue/red |+ |ignition harness |
| POWER LOCK|blue/white *1 |- |driver kick, 14 pin plug |
| POWER UNLOCK|yellow/black *1 |- |driver kick, 14 pin plug |
| LOCK MOTOR|blue/orange |5wi|driver kick, 9 pin plug |
| UNLOCK MOTOR|yellow/green |5wi|driver kick, 9 pin plug |
| DISARM DEFEAT|blue/black |5wi|passenger kick, 9 pin plug |
| PARKING LIGHTS +|green | |headlight switch *2 |
| HEADLIGHTS|black/white |- |headlight switch |
| DOOR TRIGGER|red/white |- |top of fuse box, 9 pin plug |
| DOME SUPERVISION|use door trigger | | |
| TRUNK/HATCH PIN|common with doors | | |
| TACHOMETER|black | |data link connector *3 |
| SPEED SENSE|purple/white | |back of fuse box,18 pin plug|
| BRAKE WIRE|green/red |+ |brake pedal switch *2 |
| HORN TRIGGER|white/red |- |steering column |
| WIPERS|gry (L), blk/red (H)|+ |steering column |
| LF WINDOW UP/DN|red/blu - grn/wht |A |driver window switch in door|
| RF WINDOW UP/DN|red/blu - grn/wht |A |driver kick, 9 pin plug |
| LR WINDOW UP/DN|red/yel - grn/yel |A |driver kick, 4 pin plug |
| RR WINDOW UP/DN|red/blk - grn/blk |A |driver kick, 4 pin plug |
| RADIO 12V|blue/yellow |+ |radio harness |
| RADIO GROUND|white/black |- |radio harness |
| RADIO SWITCH|gray |+ |radio harness |
| RADIO ILLUMINATE|green |+ |radio harness |
| POWER ANTENNA|black/red |+ |radio harness |
| LF SPEAKER|pink - purple |+,-|radio harness |
| RF SPEAKER|lt. green - blue |+,-|radio harness |
| LR SPEAKER|black - yellow |+,-|radio harness |
| RR SPEAKER|red - white |+,-|radio harness |
NOTES:
*1 Meter these wires while turning the key in the driver door key cylinder. Unlock requires a double pulse. Can also use the passenger door key cylinder wire for unlock, which only requires a single pulse. It is blue/red (-) in the passenger kick in a 14 pin plug.
*2 Also found at the top of the fuse box in a 13 pin plug.
*3 The data link connector is below the fuse box. The tach wire is in pin 9.