Check the voltage at your battery. Check it again after the Jeep is started. You should see close to 14v if the alternator is charging properly.
Did you check to see if the alternator is charging.
Bad alternator or bad connection.
Do It Yourself Diagnosis and Repair
SOURCE: 93 jeep grand cherokee, cruise control
Just in case you haven't got this fixed already, I just noticed on my 93, the cable from the vacuum control, (the cone shaped device on the passenger side near the coolant overflow ) was sitting against the tubes from the ac compressor, it had started to melt from me using the ac, if it melts through I am not sure if it would cause a vac leak, but if it did, you would only be able to detect it with the cruise on, not easy to check with the vehicle parked. I used a couple of cable ties to secure it away from the tube..not sure if you can tape around it to fix if it has melted.
just thought I would throw it into the mix.
j
SOURCE: 2001 Jeep Grand Cherokee- fan that sits closest to radiator
Have you tested the fan sending unit on the engine? disconnect that and if the fan runs (Key on) that is most likely the problem.
SOURCE: 1995 JEEP GRAND CHEROKEE RAN AND DIED WILL NOT START
IS IT THE 4.0L?IF SO U MAY HAVE A BAD CRANKSHAFT POSITION SENSOR.
SOURCE: generator light on 1996 jeep cherokee. what does
First clean the battery terminals & their connection to the battery. Check to see if the alternator belt is tight. Once started, connect an amp. meter to thebattery terminals. Black to black, red to red. If the reading is over 13.2, alternator is charging. If it is not, change the alternator. If it is over 13.2, you may need a new battery. Have a load test done at any reputable automotive store. Hope this helps & if it does please do the right thing & recommend this advice. Thanks
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