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Search Auto Parts Search Auto door lock 1988GMC K1500 Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> Automotive Wiring and Electrical Jerry T. New User Aug 18, 2006, 12:47 PM Post #1 of 3 (1535 views) Auto door lock 1988GMC K1500 Sign In I push the lock button on either door and the doors lock, at the actuator I have 12Volts on the gray wire and 0volts on the tan. I push the unlock button on either side and the doors do not unlock and I get 12volts on gray and 12volts on the tan wires at the actuator. Need help. Jerry T. New User Aug 21, 2006, 8:45 AM Post #2 of 3 (1521 views) Re: Auto door lock 1988GMC K1500 Sign In    Possibly a shorted switch.? DanD Veteran / Moderator Aug 21, 2006, 2:29 PM Post #3 of 3 (1517 views) Re: Auto door lock 1988GMC K1500 Sign In Here’s a wiring diagram that may help sort this out for you. As in all wiring diagrams the switches or relays in a diagram are always drawn in the rest position. Have a look at this diagram and you’ll notice that both switches when at rest are connected to a path to ground. When you push the switch to lock or unlock you are removing one path to ground and now applying power to that side of the circuit; in turn popping the lock locked or unlocked. With you having power to both the gray and tan when you try to unlock; somebody has lost there at rest path to ground. Whether it is one of the switches or an open in one of the interconnecting wires you’ll have to trace down. Hope this is of some help???? Dan. Canadian "EH"   Email This Post   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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