Ok...2008 Jeep Wrangler JK. Won’t start. Drove to work one night everything’s fine. Go to drive the next day it started up and died 2 seconds later. Did that 2-3 times finally nothing happened. Won’t turn over at all. All my lights come on and nothing dims when I turn the key. I’ve tried many things...Cleaned the terminals, Tried jumping it off, put a meter on all my relays, replaced the starter, replaced the ignition switch, checked the plastic actuator pin inside the key cylinder while I had it taken apart. If I turn the key to the On position and jump the starter solenoid it will turn over but won’t crank. And when I turn the key on I can hear the fuel pump cut on.
My last thought is maybe the PCM took a dump on me and I’ll have to replace it. Any thoughts or help would be much appreciated!
My 08 will do something similar. Try opening up the TCM and wiggle/push down I all of the relays and fuses. Then attempt to start it. I replaced 2 batteries before figuring out it was the tcm going bad.
Do the same thing to the plugs on the outside of the TCM to make sure nothing is loose there.