Ok so the person before me must have used a universal sensor and used spade connectors to hook up the sensor. I want to buy a new one but all the stores carry the bosch ones and they have a harness plug. So my ? is if I cut the harness off how do I go about making sure the right wires are hooked up to the right wires. If someone could shoot me a pic that could help

 

would the downstream harness for a 98 grand cherokee 4.0 be the same as a 97 cherokee 4.0?

 

google "O2 sensor wire colors"

 

Connector is the same according to Alldata, it's a round 4 pin connector, but the ZJ has different color wires.

pin #1 asd relay
pin 2 heater gnd
pin 3 sensor gnd
pin 4 O2 signal

 

junkyard donor harness match colors pretty simple

 

called the junk yards nothing in my area, did some searching got what I needed just one wire was a different color Brown with yellow - grey
green with white - white
solid black - white
light brown with white - black - mine is dark brown n black

 

look here for wiring diags...http://www.jeep4x4center.com/knowledge-base/index.htm