Vehicle Wiring Details for a
1990 GMC Full Size Pickup
Item Wire Color Polarity Wire Location
12V red Positive (+) ignition harness
Starter yellow or purple Positive (+) ignition harness
Starter 2 none
Ignition pink Positive (+) ignition harness
2nd Ignition none
3rd Ignition none
Accessory orange Positive (+) ignition harness
Accessory 2 none
Tachometer purple/white dist. or ECM [1]
Power Door (Lock)
Wiring Diagram for
[5 Wire] Door Lock		 lt. blue 5 Wire door boot or below
Power Door (Unlock)
Wiring Diagram for
[5 Wire] Door Unlock		 blk/red or blk/white 5 Wire dash speaker
Door Trigger white Negative (-) under dash area
Dome Supervision
Wiring Diagram for
[none] Dome		 none none none
Headlights yellow Positive (+) at switch
Parklight Positive brown Positive (+) switch or fuse panel
Parklight Negative none
Wipers purple steering column
Left Front Window
(Up/Down)		 dk. blue - brown at drivers door switch
Right Front Window
(Up/Down)		 blu/wht - tan
Left Rear Window
(Up/Down)
Right Rear Window
(Up/Down)
Trunk/Hatch Pin none
Hood Pin none
Trunk/Hatch Release
Wiring Diagram for
[] Trunk/Hatch		 none
Factory Alarm
(Arm)		 none
Factory Alarm
(Disarm) 		none
Horn black Negative (-) at column
Brake white Positive (+) at brake pedal switch
Door Motor
(Lock) 		none none none
Door Motor
(Unlock)		 none none none
Disarm none none none
Disarm No Unlock none none none
Additional Info:
[1] 4-wire harness exiting back of distributor heading towards pass. side or pull glove box and ECM is silver box with two plugs.

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.

Copyright © 2000-2006 GNU Industries, Inc. All Rights Reserved.
一般æ¥è®²ï¼Œå¥³äººè¿‡äº†å‘育期丰胸产å“，想è¦ä¸°èƒ¸å°±ä¼šæ¯”较困难，ä¸è¿‡ä¹Ÿä¸æ˜¯ä¸è¡Œèƒ½çš„粉嫩公主酒酿蛋，这个时候需è¦å€ŸåŠ©ä¸“业的丰胸产å“，而且是å¥åº·æœ‰æ•ˆçš„丰胸产å“丰胸食物。添加WeChat获å–å…费一对一丰胸指导丰胸效果ï¼