2007 Jeep Grand Cherokee no start no crank. 4 wheel drive and 8 cylinder engine. Replaced battery, starter, alternator, and crank shaft sensor. Clicking in relay when key is turned. All dashboard lights work. Checked yellow wire to solenoid and it was not loose. New battery terminals too. What else can I do?

SOURCE: car engine will not crank

on the starter there is a big battery cable and a small signal. wire connect a test light to the signal wire and try to crank the engine. if the light comes on then you will need a starter. be sure you have good connections first good luck.bye the way the light should only be on when you hold the key in crank pos.if the light is on all the time you are on the wrong wire.

SOURCE: engine wont crank

im looking at that circuit , on the start relay on your radiator support , red is always hot via fusible link , purple to solenoid as you say , orange/black wire should be hot in run or start mode , if it is not the fuse for that wire is PCM/ABS 10 amp located fuse block in driver door jam , it does go through the nuetral saftey switch , the yellow wire going to the PCM must ground that relay to activate start mode . last note there is a PCM/CRANK fuse in the driver door jam also , 10 amp , if all this is good i would like to hear more . 1 more note about the nuetral saftey switch is the pink wire going in and the orange/black wire coming out should have continuity in park and nuetral ....let us know thanks

SOURCE: 2002 Jeep Grand Cherokee Lardo misfiring

You say you changed the cam sensor. A1391 code is a crank sensor on the top of the trans. bell housing.

SOURCE: 1999 Jeep G C Quadra Trac keeps getting stuck in 4 wheel drive.

universal joint on the driveshaft may do this !
check transmission fluide as well.
good luck

SOURCE: Jeep Cherokee starting issue

On an intermittent start problem like this you may be having a starter solenoid issue or your wire on the starter from the key switch may be loose. Or you may have a corroded battery cable or the safety neutral switch may be going bad. Is it a automatic? If it were it would be the clutch safety switch going out. So do the simple things first. Clean cables like the first guy said if that does not fix it locate the starter and if you have jumper cables the next time it does it put the positive lead of the jumper cable on the Positive battery terminal and the other touch to the starter wire with the key in the run position where the big wire on the starter is, if you here it spin it means the starter motor is ok if it don't it is bad or the connection on the starter is loose. Also a bad battery cable could cause this from the battery to the starter next put a small wire into the end of the positive jumper cable and touch the S terminal on the starter if you here a solid clung it means the solenoid is good. So check the connections on the starter and tighten the starter bolts as they may have worked loose and don't have a good ground. So if you want more as stance just post on my question and I will hell p more and if this is more informative please rate