Hello all. Long post ahead but I’m hoping y’all can help with an issue I have on my 2010 wrangler. A while back I’d turn the key, there would be a slight delay, and then crank over. Finally one day it wouldn’t start. No crank just the electronics starting up. Since then I’ve replaced the battery, ignition switch, starter, and signal wire on the starter. Friday I tightened the grounds on the chassis next to the battery and reconnected the negative terminal and the horn beeped. It started and I ran a few errands all day with no issues. Today I unhooked the negative terminal to put the heat shield back on the starter and heat shrink the signal wire splice. Now it gives me a quick sec umph of the starter trying to crank. Then nothing. Every few times I turn the key I might get that quick burst of energy. I am stumped. Any help!!

 

When I put my winch on, there were a couple of "empty spots" on the positive and negative terminals that looked like a good place to mount my winch cable. After doing so, I had a similar experience where it would take a while to crank sometimes and then finally it wouldn't crank at all.

I found out that it is important to not mount anything there and to keep those nuts tight, as they keep tension on the terminals. That's my 2 cents, in case you happen to have anything mounted there, or if your nuts aren't tight.

 

I am having the exact same issue on my 2010 Wrangler LMK if you come up with a solution.

 

Run a ground wire direct from the battery to the starter case or ground. If that resolves the issue, it's a grounding issue. If nothing changes it tells you it's a power issue or engine issue.

You can just use jumper cables to the starter from the battery. But with the parts you already replaced, you should start with a very rudimentary approach to the trouble shooting and dont asume your new parts are good.