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Im cam, and ill try to help you out.
The fuse 22 is for the fuel? am i correct?
I dont know what size engine you have but i have had 2 of these jeep engines with that fuse blown.
Both times there was a wire that was rubbing on the back of the fuel rail.
This is near the back of the engine as the harness rubs on it and blows the fuse.
Replace the fuse and pull on this harness a bit and see if it blows while you are inspecting it.
I hope this helps and you have the same issue i have.
let me know
im sorry, i forgot to mention... they were both 4.0L's
check that harness out.
If thats ok, than check the wire to the fuel pump, make sure its not rubbing any where and grounding out.
IF all the wiring is ok, than check the amperage draw on the fuel pump. IF the fuel pump is drawing too mutch ampreage it will blow the fuse as well.
I hope its just in that harness though, lol.
that would be a nice easy fix.
let me know what you find!