1999 GMC Safari basic question

Hi Group:

I'm trying to install a Crimestopper two-way starter/alarm and am stumpped.  What is the real difference between Ignition, Ignition 2, and Ignition 3?  Do they all have +12 on them in start and run? 

Thanks, Dick Pelland

they are mostly the same they show 12volts on start and run, but they power different circuit componente trought out the car ( fuel punp, PCM, BCM and so on)

|       ITEM      |     WIRE COLOR     |POL|       WIRE LOCATION        |
|              12V|red & RED / white     |+  |ignition harness            |
|          STARTER|yellow              |+  |ignition harness            |
|         IGNITION|pink                |+  |ignition harness            |
|  SECOND IGNITION|pink/white or white |+  |ignition harness            |
|        ACCESSORY|orange              |+  |ignition harness            |
|       POWER LOCK|lt. blue            |+  |driver door boot *2         |
|     POWER UNLOCK|white               |+  |driver door boot *2         |
|       LOCK MOTOR|gray                |   |driver door boot            |
|     UNLOCK MOTOR|tan                 |   |driver door boot            |
|    DISARM DEFEAT|tan                 |   |passenger door boot         |
| PARKING LIGHTS +|brown               |   |switch or rear harness      |
|       HEADLIGHTS|yellow              |+  |headlight switch            |
|     DOOR TRIGGER|purple              |-  |headlight switch            |
|  TRUNK/HATCH PIN|common with doors   |   |                            |
|TRNK/HTCH RELEASE|lt. green           |+  |relay in RR quarter panel   |
|       TACHOMETER|white               |   |ECM under hood *1           |
|       BRAKE WIRE|white *3            |+  |brake pedal switch          |
|     HORN TRIGGER|black               |-  |steering column             |
|           WIPERS|purple              |+  |steering column             |
|  LF WINDOW UP/DN|dk. blue - brown    |A  |driver window switch        |
|  RF WINDOW UP/DN|lt. blue - tan      |A  |driver kick panel           |
|  LR WINDOW UP/DN|                    |   |                            |
|  RR WINDOW UP/DN|                    |   |                            |

Notes:
NOTE: This vehicle has the passlock II immobilizer system that, when adding a remote start, must be interfaced with. Use DEI part 555t or 555L.   *1 ECM located driver side engine compartment, near the battery. White wire found in black plug labeled white.  *2 Can also be found at relays in passenger kick panel or on keyless models at the keyless entry module behind the radio to the left.  *3 Also found in driver kick in harness running to rear of vehicle.