This happened to me recently. I turned the key, all the lights came on but the car wouldn't crank. Got a jump and got the car home. Took the truck to AutoZone and bought a new battery. Problem solved.

Went to start the car one day and the fob wouldn't unlock the door. Opened the door with the key (setting off the alarm), put the key in the ignition and got no lights and no start. Replaced the battery ( the original battery was the one the car had when I bought it new in 2004, the replacement battery was the second AutoZone battery I have bought that had failed shortly after purchasing). Problem solved.

A couple of weeks later I turned the key, all the lights came on but the car wouldn't crank. Got a jump and got the car home. Checked this forum and found a page titled Mystery No Start. Turns out this is a problem with bad solder joints on the relay control module. Removed the module, found bad solder joints just like the ones in the pictures on the Mystery No Start page, resoldered the joints per the instructions and replaced the module. Problem solved.

I did buy one of those portable jump start batteries with the jumper cables on it that now resides in the trunk but don't expect to have to use it.

The Mystery No Start page is here:

https://www.crossfireforum.org/forum...-no-start.html