Relay heats up and closes when it shouldn

I have not hooked it up to starter yet. I reversed the polarity on the diode that was an integral part of the relay eg 85-86 and it does not heat up anymore.  My problem still remained.  What was happening was that the relay would stick closed. I had to remove the 12v source at 30 for it to delatch. However, i read a post by administrator that said that it is normal for the relay to remain latched. I should have hooked up 12v ignition wire instead of 12v constant to terminal 30. Now, using 12v from ignition, the relay delatches when i turn off ignition. This actually works out good because now i can turn off radio and still retain the ability to start car if i stall. Thanks for your help.1991 240sx

alarm=model 2620.web central door locking system