Alternator?
When i disconnect the positive from the terminal it stops running
First, welcome and good luck
Second DO NOT EVER DO THIS
The newer the car is, and the more "solid state" stuff you have (ignition, regulator, radio, cruise, on and on) the greater chance that the GREAT BIG VOLTAGE SPIKE which happens when you do this will "kill" something in the car.
Do a little simple troubleshooting.
On the later cars, the alternator has two field connections. One terminal should be blue, and is hot (ignition run) anytime the key is in "run." Identify this lead at the alternator and remove the OTHER wire.
Now turn the key to "run" and connect a clip lead from the exposed terminal you disconnected (normally green) hook that terminal (not the wire) at the alternator to GROUND. With the key on, you should see a small spark, indicating the field is drawing current.
Start the car and see if it charges, preferably with a voltmeter at the battery. Bring the RPM up carefully, as you are "full fielding" the alternator, so it is at full output, depending on RPM
If it charges, now connect the green wire back up, and go up to the regulator connector and pull it loose.
JUMPER the two connections in the regulator connector. ONCE AGAIN it should charge "full output" depending on RPM.
IF THE ABOVE happens, you have a bad regulator.
If not, you have a wiring problem.
Post back, we'll help you some more
EDIT MAKE DARN SURE the regulator is grounded. Scrape it clean, clean the bolts/ mounting area, and if possible, find some star washers under the bolt heads.