Question about 1999 Pontiac Grand Am GT

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Power lock wont lock door on 99 grand am will only unluck them.

I have a 99 grand am gt coupe, most of the time i have to lock the doors manualy because the power lock wont lock them. when i press the lock button it doest do anything not even a noice, but when i press the button to unlock the doors it works all the time. what could be the problem, i have an alarm could that be the problem? Help please im getting anoyed of locking the doors manualy.

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It is more than likely your buttons, if one button is bad neither will work.

Try changing the buttons, if that does not work, then it could be one of the motors,
same as the buttons if one is bad neither will work.

to change the buttons, simply remove the screw on the panel, if there is one, if not then insert a small flat head screw driver on the bottom of the panel and gently push down this will pop the panel out.

once you get it out pull the plug off, there is 2 8mm screws holding the switch in, then screw your new one in and plug it back in, do the same on the other side. the panel will just snap right back in.

If this does not work, check the motor, you have to remove the door panel, then the silencer pad, once you get in, it will be inside the door near the back. about half way down, it is round with a rubber boot, it is held in with some rivets. If you need to replace it you will have to drill them out, and replace with nut and bolt.

To test it, if you have a corless drill... pull the plug from the motor, and stick 2 wires into the plug, one for positive and one for negitive, and touch the ends to the battery. if it does nothing then it is your motor, but make sure you switch the wires from one side ot the other to test both up and down.
One wire is for up and one if for down.

If you do not have a cordless drill battery just use long peices of wire and use the car battery.

Don't worry there is not enough power in a car battery to shock you.

Posted on Nov 26, 2008

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