No start After Cruise Install

Ok well I bought a cruise system a while back off another xj and installed it into mine just today. (Not sure what year it was off of but is was post 97 and mine is a 97 six cylinder, 5-speed) I disconnected the battery and did everything according to how to write up on here said. But after install the airbag light came on and the cruise light wouldn't so I thought that the clockspring must have been done wrong. I took the batter off for thirty minutes again and I took it all apart and realized that the clock spring plugs had come undone somehow. I plugged them back in and reassembled everything again. At that point I reconnected the battery and tried to start the jeep. The lights came on and everything then when I went to crank it everything went dead after a click. I checked all fuses and nothing is blown. Does anyone know what might have happened or had this happen to them? Also what else might I check or is there a fuse I might have missed? Thanks

Ok well I might have a break through but I dont know what it means. I noticed that my cigarette lighter works with the doors closed and charges my phone but as soon as the door opens it quits working. I also noticed that if I turn the key the brake light on the instrument cluster barely lights but still nothing to make it start.

honestly, it sounds like a bad battery, or a bad connection with one of the cables. do the headlights work? what happens when you turn the headlights on and try to crank it?

X2 on the cables..Did you clean them when you had them off? Are they tight?Check your ground

The headlights don't work. I cleaned the cables when I had them off. They are tight and the ground is good. The battery started the jeep just fine right before that just the airbag light was on which meant I didn't do the clockspring right so I fixed that. But when I hooked the battery back up and got in I turned the key and all the gauges and everything came on like it's supposed to but when I pushed the clutch in and turned the key to start it I just heard a click and everything went dead. Now when I get in the cigarette lighter works with the key not turned but as soon as I turn the key it dies. This morning I went out to look at it and the fuse box made a sound like a fan turning and the gauges almost worked but then nothing yet again. Does that help anyone? And I know you can't really say what it is without being here but I just need a place to look I am not good with electrical.

Put a meter on the battery, see what it tells you...Start at the easy stuff