I do not want to insult you but it may be best to get a pro in.
Your questions just are not in logical order.
I have no problem helping you but things must be done in a logical order or you will just go in circles.
Also it is important that you call the parts by the correct name or it will get very confusing.
For instance you say "motor" but the compressor has a motor and so do the two fans so I do not know what you are referring to.

First I thought that you had already checked and the compressor was running but the fridge was not cooling properly.
Usually you can hear the compressor running also it will be warm and you can feel it vibrating.
So if it is running but not cooling correctly in the freezer you could have 3 possible problems.
A problem in the sealed system OR the evaporator (freezer) fan is not running OR a defrost problem.
You said the evaporator coils were heavily iced/frosted over and this indicates that you have a defrost problem.
So the next step is to check the defrost system as I posted earlier.

The link I posted earlier has a pretty good description of how a fridge works you may want to read that section.

At 300 bucks they were trying to rip you off.
Perhaps a friend can help you out as two heads are better than one.

I did not understand that you were talking about the defrost timer when you said you were turning it off.
You are not turning the unit off you are turning defrost on.
I think we just have a communication problem.

So lets go through it.
Turn the defrost timer cam until the fans and compressor shut off, you are now in defrost.
Leave it there.
Now check if the defrost heater heats up.
Note: The evaporator coils must still be covered in ice/frost for this to work because the defrost thermostat opens just above freezing and this kills power to the defrost heater.
If the heating element does not heat up then

Unplug the refrigerator.
Remove the wire for one side of the heating element from the wiring and measure it for continuity, usually around 20 ohms or so.

If the heater is OK
Remove one wire to the defrost thermostat and measure it, should be 0 ohms when frozen. Note that it opens just above freezing so must be frozen to check it. Also inspect it, if it is bulged at all replace it even if it measures OK.

If both the above are OK then odds are the defrost timer contacts are toast.
Best way to test this is a live test to see if you have 120 volts across the heater/defrost thermostat combo.

If you do not own a meter, I would suggest you purchase a one. You can get a decent digital multimeter for under $20.00. You do not need fancy though it is nice if the leads are a couple feet long.
If it saves ordering one unnecessary part it has paid for itself and you end up owning a useful tool.
Most places will not let you return electrical parts so if you order it, you own it.
A couple things to watch when measuring ohms and continuity
1. Always remove power from the machine otherwise you could blow your meter.
2. Always disconnect at least one side of any device you are checking. This eliminates the possibility of measuring an alternate/parallel circuit path.
3. When checking for closed contacts and continuity use the lowest scale (Usually 200 ohms). Then try higher scales. This scale is 0 to 200 ohms so if the device you are measuring is 300 ohms this scale would show an open circuit which it is not, you are just measuring outside the scale's dynamic range.
4. When you start always short the meter leads together. This will tell you that the meter is working and if there is any 0 offset.

There is a good STICKY at the start of this forum about it's use.

ok trying to find parts is there another name for the defrost heater .. looking at diagrams and that name is not coming up.. i see a harness in middle of freezer that hooks to something.. could it be called a heater harne???

Yes that is what it is.

Part number: AP4355467

It is manufactured by GE so I cannot get a wiring diagram.
GE likes to keep everything a secret.

So I cannot say what those wires are for.

Does the heater connect to a defrost thermostat?
It should be clipped onto the evaporator coils.
Part number: AP2071262