Vehicle Wiring Details for a
1990 Honda Civic
Item Wire Color Polarity Wire Location
12V white/black Positive (+) ignition harness
Starter black/white Positive (+) ignition harness
Starter 2 none
Ignition black/yellow Positive (+) ignition harness
2nd Ignition none
3rd Ignition none
Accessory yellow Positive (+) ignition harness
Accessory 2 blue/white Positive (+) ignition harness
Tachometer blue distributor
Power Door (Lock)
Wiring Diagram for
[Negative (-)] Door Lock
green/white Negative (-) in drivers door
Power Door (Unlock)
Wiring Diagram for
[Negative (-)] Door Unlock
green/red Negative (-) in drivers door
Door Trigger green/red Negative (-) low in drivers kick
Dome Supervision
Wiring Diagram for
[] Dome
use door trigger
Headlights red/blue Positive (+) steering columm
Parklight Positive red/green Positive (+) steering column
Parklight Negative none
Left Front Window
red/yel - red/blu drivers door motor
Right Front Window
blu/yel - blu/grn drivers door harness
Left Rear Window
grn/yel - green A drivers door harness
Right Rear Window
yellow - yel/grn A drivers door harness
Trunk/Hatch Pin green/black Negative (-) low in drivers kick
Hood Pin none
Trunk/Hatch Release
Wiring Diagram for
[] Trunk/Hatch
Factory Alarm
Factory Alarm
Horn blue/red [1] Negative (-) steering column
Brake green/white Positive (+) brake switch
Door Motor
Door Motor
Disarm none
Disarm No Unlock none
Additional Info:
[1] High-current ground. Use a relay when interfacing withThis circuit.

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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