Originally Posted by misvaer27
2001 Jeep Wrangler TJ. Manual Transmission.
1) Jeep is turning over a bit slow when starting and will stall at idle until it has been driven a mile or two
2) Decide my first step is a new battery since the current battery is 9 years old and multimeter suggests it is getting a bit weak particularly when cranking
3) Buy new battery. Correct ampage etc. Install new battery and... nothing... one click when trying to start but NO power. No lights, no horn, no hazards... nothing. Multimeter says battery is fine. Multimeter says power being drawn through cables.
4) Put old battery back in. Everything is fine but obviously still turning over slowly.
5) Take new battery back to shop. They test and say everything is fine but give me another new battery just in case. Go back home.
6) Install new new battery. Same result. One click when trying to start but NO power to jeep. Nada, zip, zilch. Cables installed properly, little plastic caps off. Multimeter says new new battery is fine. Multimeter says current flowing through battery cables. All fuses check out.
Any new thoughts appreciated? Could there be a problem with something else and the new battery is throwing it off?
I've posted a writeup on testing the primary electric (battery, starter motor, alternator) on this forum - and several others. It's a simple procedure that requires a multimeter, a helper, and about 15 minutes. (No, I don't have a link handy, but it should be easy to find.)
Find it, follow it, and you'll have a better picture of your primary electrics.