Re: emergency brake 2006 Grand Cherokee
Hopefully it just needs an adjustment and hasn't broken off anywhere...I seem to recall having to take out seats and a fair amount of trim to get at either the front or rear sections of the parking brake cable.
Also, it is not uncommon for the parking break shoes to cause a loose feeling at the lever (either through improper adjustment, insufficient material, or something not put together quite right!)
I would get at the rear brake shoes and see what's going on back there before trying to get at the cable as it travels through the car. I would bet it is more likely a problem at the e-brake itself, rather than the cable.