Where to put the green grounding wire on a dryer when switching from a 4 prong to a 3 prong. I need a diagram of how it should look when done. Thank you, Jacq.

When replacing a 4 prong cord with a 3 prong cord you put black and red wires to the outside posts of your terminal block. The white wire from your three prong dryer cord goes to the center of your terminal block. The yellow and green wire from the dryer go together and attach to the cabinet ground.

Unplug the dryer then remove the terminal block cover and disconnect the 3-prong cord from the dryer. Note that the cord has red , black, and white wires but sometimes the red and black wires are both replaced by same color wire, usually gray and can switch places. There's also a ground strap wire also connected to the center terminal together with the white (neutral) wire.

Get yourself a 4-prong cord and note that it has red, black, white, and green/yellow wires but sometimes, like the 3-pronged one, the red and black wires are both replaced by same color wire, usually gray and can also switch places. All you have to do now is connect the 3 wires in the same manner they are connected as 3-prong cord to the terminal block. The ground strap wire now just need to be connected to the remaining 4th wire, the green/yellow wire instead of the center terminal together with the white (neutral) wire. Reinstall the terminal block cover and it's done.

It can be observed that converting a 3-prong cord to 4-prong cord is merely splitting the neutral line and the ground thereby increasing the number of prongs from 3 to 4 whereas, on the other hand, converting a 4-prong cord to 3-prong cord is merely joining the neutral line (white) and the ground (green/yellow) thereby reducing the number of prongs from 4 to 3.. The links below might enlighten you further on this matter.

Four-prong to Three-prong Electric Dryer Conversion
Three-prong to Four-prong Electric Dryer Conversion

It's either you convert the 3-prong outlet to 4-prong or the 4-prong cord to 3-prong. But the latter is easier and more feasible. Unplug the dryer then disconnect the 4-prong cord from the dryer. Note that it has red, black, white, and green/yellow wires but sometimes the red and black wires are both replaced by same color wire, usually gray. The red and black wires are lines L1 and L2 reversibly, meaning they can switch places, while the white and green/yellow wires are the neutral line and ground, respectively.

Get yourself a 3-prong cord and note that it has red , black, and white wires but sometimes, like the 4-pronged one, the red and black wires are both replaced by same color wire, usually gray and can also switch places. All you have to do now is connect these 3 wires in the same manner they are connected as 4-prong cord to the terminal block. The wire strapped to the dryer cabinet and connected to the green/yellow wire of the 4-prong cord wire is now left hanging. The last step is to connect this hanging strap wire to the same terminal on the terminal block (center) where the white wire (neutral) is connected and it's done.

It can be observed that converting a 4-prong cord to 3-prong cord is merely joining the neutral line (white) and the ground (green/yellow) thereby reducing the number of prongs from 4 to 3. On the other hand, converting a 3-prong cord to 4-prong cord is merely splitting the neutral line and the ground thereby increasing the number of prongs from 3 to 4. The link below might enlighten you further on this matter.

Electric Dryer Prong Conversion

Yes, you can put a 3-prong plug in place of the 4-prong plug.

The 4-prong plug has red, black, white, and green/yellow wires while the 3-prong plug has red, black, and white wires. The only difference is the green/yellow (ground) wire of the 4-prong plug which is attached to the dryer cabinet. All you have to do is connect the wires of the 3-prong plug in the same way the same wire colors are connected with the 4-prong plug then connect the terminal on the cabinet, where the green/yellow (ground) wire of the 4-prong plug is formerly connected, to the white wire of the 3-prong plug.

Go to this website, they have color coded pictures to show you how to hook up 3/4 wire hook ups for dryers.
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http://www.selfhelpandmore.com/switch-outlet/dryer-circuit-wiring-and-hookup.php

Is it an electric dryer or gas dryer? If it's a 120 volt gas dryer, then no, you need to keep it on a 3 prong cord. If it's an electric dryer, then yes it is possible to install a four prong plug onto it. Although it isn't recommended.
The main thing you need to know is which wire is ground. From the machine, it should be the green wire. On the plug, there should be on prong that is slightly longer than the other 3. The ground has to be the first one in the wall receptacle and the last one out. So the slightly longer one is where the green ground wire needs to be wired in. The other two wires are both power so it doesn't really matter which prong you wire those wires at.
Once again I'll remind you that it isn't recommended to convert 3 to 4 prongs like that. Just be careful and make sure you aren't touching any live wires.

black to black lug white to white lug red to red lug green to ground(any bolt that is attached to body of dryer)

You'll need to get a new 4 prong cable. Connect wires as color coded now and connect the green to the frame.

the green wire will attach to the dryer cabinet. The white wire will attach to the middle and the other two(red& black) will attach to the outside of the terminal block.

Good Luck!!

dre, sounds like you moved and the dryer electrical outlet is only 3 pronged, This tells me that the dryer will be grounded through the neutral leg. Just hook up the cord and you should be fine. Make sure the white is in the center. Catriver.