Vehicle Wiring Details for a
2001 Saturn L-Series
Item Wire Color Polarity Wire Location
12V red Positive (+) ignition harness
Starter yellow Positive (+) ignition harness
Starter 2 none
Ignition pink Positive (+) ignition harness
2nd Ignition green Positive (+) ignition harness
3rd Ignition none
Accessory orange Positive (+) ignition harness
Accessory 2 brown Positive (+) ignition harness
Tachometer [3] [3]
Power Door (Lock)
Wiring Diagram for
[Positive (+)] Door Lock
orange/black Positive (+) drivers kick panel
Power Door (Unlock)
Wiring Diagram for
[Positive (+)] Door Unlock
red/black Positive (+) drivers kick panel
Door Trigger [1] Negative (-) [2]
Dome Supervision
Wiring Diagram for
[] Dome
use door trigger
Headlights blue [6] Negative (-) steering column
Parklight Positive brown Positive (+) steering column
Parklight Negative none
Wipers green(L), purple(H) Positive (+) steering column
Left Front Window
dk blue - brown switch in center console
Right Front Window
blue - brown switch in center console
Left Rear Window
dk green - purple A switch in center console
Right Rear Window
lt green - purple A switch in center console
Trunk/Hatch Pin red/black Negative (-) BCM, gray 24 pin plug [2]
Hood Pin none
Trunk/Hatch Release
Wiring Diagram for
[Positive (+)] Trunk/Hatch
black Positive (+) switch [4]
Factory Alarm
Factory Alarm
Horn black Negative (-) steering column
Brake lt blue Positive (+) brake switch
Door Motor
gray drivers kick panel
Door Motor
tan drivers kick panel
Disarm tan passengers kick panel
Disarm No Unlock none
Additional Info:
This vehicle has the passlock II immobilizer system that, when adding a remote start, must be interfaced with. Use Commando part PassMod. The lt. green key sense wire at the steering column must see a ground during remote start to keep the "SERVICE" light from coming on. [1] The drivers door is gray/black. The other doors are black/white. Both wires are in the gray 24 pin plug at the BCM. Use both wires and diode isolate each. [2] The BCM is located above the glove box. [3] On the 4 cylinder models, use purple/white at the ignition module on the driver side of the motor. On the 6 cylinder models, at the ignition coils on top of the cylinder head on the drivers side of the motor, use any one of the three wires that is not pink or black. [4] Can also use black/white (+) at the BCM in the gray 24 pin plug. [5] The amplifier in under the driver side dash above the brake pedal. [6] Low beam is high current negative, must use relay.

ATTENTION: This wiring information is being provided free of charge and on an "as is" basis, without any representation or warranty. It is your responsibility to verify any circuit before interfacing with it by using a digital multimeter. GNU Industries, Inc. assumes no responsibility with regards to the accuracy or currency of this information. Proper installation in every case is and remains the responsibility of the installer. GNU assumes no responsibility resulting from an improper installation, even in reliance upon this information.

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