No. It secures the headlight assembly in place. The headlight adjustments are the square slot crews that have a spring assembly around them.
replace headlight Pontiac MontanaAssuming it is the same as my 1999, there are two "wing nuts" securing the entire plastic headlight assembly. One is mounted at the top-inboard(towards engine), And the other is outboard of the assembly. Once these two wingnuts are removed, carefully remove the whole assembly. The headlight bulb is contained in the socket... one quarter turn counter-clockwise will remove the socket from the housing.
If you are talking about the bulb itself all you have to do is look at the back of your headlight encasement and there will be wires for the bulb going into the encasement. There is a plastic lock on the back of the headlight. Just turn it, and then all you have to do is pull out your headlight, replace it, and pop it back in just the way you took it out. Make sure to twist the plastic piece until it locks (doesn't take much).
I've alway replaced the headlight by just turning on the headlights so they will open up. Then remove the plastic shrourd from around the headlight by removing the Phillips screw on the side of the shroud that is towards the center of the hood and carefully prying the other side of the shroud loose from the headlight. Once the shroud is removed, you can remove the top 2 screws from the top of the headlight bulb retaining frame, bend the frame down, and pull the headlight out. Disconnect the headlight connector at the rear of the bulb, install the new bulb and put the part back together again. Make sure you remove the 2 screws from the crome retaining frame to access the headlight, do not remove the black screws behind the bulb. These are the adjusting screws that set your headlight alignment.
Hope I can explain this properly........ Lift the hood, position yourself in front of the bad headlight. See the black plastic shroud that covers the radiator, it runs the width of front of the engine compartment? See that little cutout in the black plastic? The cutout is in the plastic, directly above the headlight. There's an identical cutout above each headlight. Theres a little lever in the cutout, pull that lever straight up, that will release the entire headlight assembly.
It should be fairly easy, from the front of the vehicle there should be some screws that hold in the plastic casing, I think they are the star wrench screws. You should be able to take off the plastic piece just around the headlight and blinker unless it is a dual headlight. Once the plastic piece is off the headlight has a thin metal rim around it that has scews in it as well. Remove those (careful that you are not turning the headlight adjusting screws) and the headlight should come out and then you just unplug it, plug the new one back in and put everything back together.
I have a 95 and I believe the headlight housings will be swapped out in the same manor. There are plastic covers under the hood that protect the back side and wiring of the headlights. You must remove these. Then you will see 3 circular plastic pieces with bolt ends protruding from them which are used to adjust the headlight direction. They will have metal clips that hold the plastic pieces in place. They each have 2 holes which need to be spread apart, this will allow you to pull up on the clips and remove them. Now you can remove the headlight housings.
To replace the front turn signal bulb in a 2005 Montana, you have to access it from the engine compartment. Undo the front headlight assembly as per the instructions noted elsewhere. There is one screw (machine Head) on the outboard side of the headlight assembly, and one 'thumb screw' on the inner side to the assembly. I found it difficult to remove the headlight assembly, and I have found you don't have to. (You can break the housing, so don't try taking it right out) Just loosen it enough to get your hand behind the assembly. I would also suggest you remove the plastic fasteners from the top of the front bezel in order to make loosening the headlight assembly easier, and to prevent the possibility of damaging or breaking the front bezel. The plastic fasteners are easily removed with just a pair of pliers. Once the headlight assembly has been moved forward slightly, you can get your hand down the opening, and feel for the turn signal lamp assembly. Twist to remove. There is enough wire in the harness to bring the lamp assembly to 'the surface' where you can replace the bulb easily. Replace bulb and test. After testing, replace headlight, and then plastic fasteners at the top of the front bezel.
There should be a screw connecting the corner light to the main headlight, and there is a metal piece that pops into a plastic connector on the headlight as well. You just push the metal piece into the plastic no screw. The top screw however should be secured into the head light. If you are missing the screw hole on your headlight, then you will need to replace the headlight. I just did both of mine from an accident! Hope this helps.
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