Radio says wait.
 

I entered my radio code incorrectly 3 times and now it says "wait" I have left the ignition on for about 4 hours in the hope this will time out and allow me to enter the code again. It is still saying wait! How long do I have to leave it, or should the engine be runing for this to work?

I have now fixed this. The key needs to be in the engine run position, not just the acc position, for about 45 minutes. A bit of a problem if you dont want to drive that long and have daytime running lights! I just removed the fuse for all the lights, turned the key to run, locked the car and left it for an hour. Came back and the radio said "code" https://www.cherokeeforum.com/images/icons/icon7.gif

what radio and truck was this?

This is on a 2000 Grand Cherokee with the standard radio with the infinity option, although I think thats just better speakers, cd multichanger and stuff.

I know I'm being a bit thick, but which number is the correct fuse ? Also, would removing the fuse for the radio not solve the problem, so I don't have to leave the Jeep's ignition on with the keys in it ? I only have one key fob, so I wouldn't be able to lock the vehicle.

As far as I know Grand Cherokees up until 2011 didn't have security codes.