Good evening i have a 2011 grand Cherokee with a problem.everything works except for gas pump.when run volts direct to pump it works, but when the truck starts up by it self it wont.

SOURCE: 96 jeep grand cherokee wont start

my 1996 jeep is doing the same thing.the fuse I have been changing is under hood in fuse panel on left 20 amp sm. in center of fuse panel closest to bat.

SOURCE: 1999 Jeep Grand Cherokee Heat not working

Change your Thermostat.

SOURCE: 1995 jeep grand cherokee wont start

it most definately is the crank shaft sensor. same exact prob i had. it costs about 60 bucks and 3 minutes to replace yourself. one bolt holds it into the transmission bell housing and one connector wire. very simple fix. call off the wrecker. just have plenty of ratchet extensions available i had to go in from behind the transfer case to reach the bolt but it was still pretty simple to install.

SOURCE: 1993 JEEP GRAND CHEROKEE LAREDO- TRUCK WONT

OK...I have a 93 outside...one diagram I have shows an ignition module next to coil...but there is none on mine, (4.0 engine)
Two items to check are crank sensor and cam sensor inside distributor. Test procedure can be found in just about any manual including haynes.
You will need a decent volt/ohm meter to do testing. You can also check codes by turning ignition switch on/off three times, leaving it on the third time. Check engine will flash code #'s (ex: one flash, pause two flashes= the number twelve.then followed by a longer pause then another set of flashes etc.)

SOURCE: Cant get truck to stay running

did you try the fuel filter