2014 jk, went out to the garage and it won’t start, checked the battery, bad battery, put a new one in, heard a click on the starter, new starter and still won’t. I put the key in the ignition and everything lights up, radio and air works, turn it over and get nothing, I’ve checked for grounds or bad cabling nothing noticed, any help is appreciated.

 

if the motor is not turning over check the starter relay in the fuse box under the hood, you can check on here in the forums or google it for instructions..

 

A click but no start usually indicates either a dead battery, bad solenoid, bad starter, or bad connection. On most vehicles, I usually start by jumping out the solenoid with a heavy wire. If that doesn't do it, I then put jumper cables from the battery directly to the starter. If that doesn't do it, I then jump from a known good battery direct to the starter. After those tests, I generally have a pretty good idea where the problem lies.

I haven't looked at my Wrangler to see if there is any reason not to do these tests on it. Some of the newer cars do have funny systems that get damaged from the old time tests. For me, anything less than 40 years old is a newer car.

 

When you try to start and get the click do the lights inside go out?

If so that’s pretty indicative of a loose connection, everything is fine until you put a high amp load on it, then the loose or dirty connection opens up and it can’t carry the current.
When you say you tried grounds did you try the engine side? You can validate ground by connecting the neg side of the battery to the engine block with one jumper cable, if it starts then of course you have a bad ground, often you have to remove it from the block, clean it with a wire brush, both the wire end and block and reconnect, it helps to keep it from reoccurring if you put some grease on it before you bolt it back together