1999 GMC Safari basic question

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.

Luis

Sound Waves

Is up to the installer to test all wires with a DMM whenever possible.

Ignition wires need 12V DURING crank, ACC wires do not need 12V DURING crank.  If it says ignition, then use the ignition output of the Crimestopper.   Your remote start unit has 1 ignition output, 1 acc output, and one selectable output, it comes set as ignition, so your safe to use it as is.  (At least with the RS999FM).Hak

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