Oxygen Sensor Sensor Wiring Diagram (PART 1)
NOTE: The above oxygen (O2) sensor wiring diagram applies only to 1993, 1994, 1995 4.0L Jeep Grand Cherokee.
The oxygen sensor heater element gets battery power from the fuel pump relay (in the power distribution center)
Oxygen Sensor Sensor Wiring Diagram (PART 2)
The oxygen (O2) sensor shares ground with several other sensors thru' the BLK/LT BLU wire.
PCM connector pin 4 is the source of the ground that's fed thru' the BLK/LT BLU wire.
Where to Buy the Oxygen Sensor and Save
The best place to comparison shop and get an idea of how much your Grand Cherokee's oxygen (O2) sensor cost (and how much you can save) is here:
Not sure if the above oxygen (O2) sensor fits your particular Jeep Grand Cherokee? Don't worry, once you get to the site, they'll make sure it fits by asking you the particulars of your vehicle. If it doesn't fit, they'll find you the right one.
If this tutorial was helpful/informative, you can find a complete list of tutorials here: Jeep 4.0L Index of Articles.
Here's a sample of the tutorials you'll find there: