Starter problems

Alrighty then!

Lets try a few EZ things 1st

Take loose/ clean / tighten every WIRE/ CONNECTOR that run from the battery to the starter---including the ground wire (both ends)The connections on the Solenoid (follow POS BAT cable, it goes to it)even the "Squeezer" connections where your battery clamps connect to the Cable (if yours ain't made on). And of course lets not leave off the Starter connector

Now I hope you sorta understand this, insure no wire or connector is accidentally grounding out (such as a Ring connector, twisted around and contacting the body of the starter etc etc.

The only other 2 things I might add is:

Even new stuff can be bad (starter)

Or maybe your solenoid is about played out (it has big copper plates in it, over time and Sparking inside, the plates get pitted and burned. Then GOOD contact becomes intermittent or if fails completely)

Last of Info. Have the Battery tested and maybe remove the starter and have it tested (may have a warranty on it)

Autozone and Advance Auto Test For FREE. Other places might too!

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Merry Christmas!

The Medic

If this is an automatic trans, the Cherokees have a lot of problems with the Neutral Safety switches. Try moving the shifter around to neutral and other positions while holding the key is "start" and see anything triggers.