I cannot say I have ever heard of this.
First thing I would suggest is to inspect your work, meaning the harness, its routing, all the pins on both sides of each connector. Make sure you havent pinched osmething or bent or pushed a pin.
If everything appears to be ok, It almost sounds like your module has a bad ground or has been damaged with the behaviour you are describing. Like its searching for a ground and finding it through the trunk circuit of the vehicle hence why it pops all the time.
I would recommend performing a voltage drop check on your ground connection you made to see what you are getting.