YES
Yes. It's the same setup.
Engine sizes, models? Not enough info to reply. My instinct is to say NO.
Two on the engine, one on the transmission/transfer case.
Yes and no. As long as the motor is the same, the harness should be the same.
Weak battery or alternator output.
Cherokee Laredo, no. Grand Cherokee Laredo, yes.
I bought a 92 Jeep Laredo and found it had a 1994 jeep engine in it.
Yes
Yes
I6 - http://upload.wikimedia.org/wikipedia/commons/b/b4/1993_Jeep_Grand_Cherokee_4-liter_engine.jpg
Yes
no