2000 Jeep Cherokee. Downstream O2 sensor wiring severed. Have to wire in a new connector. The wire colors are Blk, Gry, Whi & Whi. How do I determine the correct position of the two white wires in the connector? I have the Haynes manual but the wire diagrams are useless. Thank you AGC

The 2005 Jeep Grand Cherokee Laredo 3.7L typically has two oxygen (O2) sensors. One is located upstream (before the catalytic converter), often referred to as the pre-cat or upstream sensor, and the other is located downstream (after the catalytic converter), known as the post-cat or downstream sensor. In many cases, the upstream and downstream sensors are not the same and serve different purposes in monitoring and optimizing the air-fuel mixture and emissions.

Instead of looking at colors look at the position of a wire in the socket. The O2 heater wires are usually the same or one might have a stripe but they're interchangeable the sense wire is a totally different color. I hope this helps. Take Care.

Connector Part Information • 15416722 BLK
• ASM Conn 12 F GT
Pin Wire Color Circuit No. Function
1 DK GRN 1433 Clutch Start Switch Signal
2-3 -- -- Not Used
4 YEL 772 Transmission Range Switch Signal B
5 BLK/WHT 771 Transmission Range Switch Signal A
6 GRY 773 Transmission Range Switch Signal C
7 BLK/WHT 451 Ground
8 WHT 776 Transmission Range Switch Signal P
9 LT GRN 275 Park Neutral Position Switch Signal
10 GRY 1524 Back-Up Lamp Supply Voltage
11 PNK 839 Ignition 1 Voltage
12 PPL 639 Ignition 1 Voltage
This all I could find, hope it is the correct one.

The two white are the heater
The black the ground
The gray the O2 Sensor output,
you back probe to check Voltage
& Switching Times

The vehicle wiring harness does not have to match
the sensor, BUT -- you need to have the same
connector on the sensor

If you have a universal cut & splice, you have junk,
and we given the wrong part

Get a Bosch or NGK, OEM sensor & just
plug it in

Hi, the easiest way to tell is by the signal wire color. These are the signal wire colors:
right front: dark blue/pink stripe
left front: dark blue/light blue stripe
right rear: Brown
left rear: dark blue/yellow stripe

Get an o2 sensor that is correct for your vehicle. Forget the universal,wire matching game.

First what do you mean by a universal o2 sensor? You must make sure that you have the right o2 sensor, most newer vehicles have four o2 sensors 2 upstream and 2 downstream, upstream and downstream are meant to show where the sensors are in relation to the catalatic converter,some o2 sensors have 1 wire or up to 4 wires most with four wires are heated o2 sensors so you need to be sure you ve gotten the right o2 sensor for you vehicle as well as the right replacement for the proper location! My experience is that most after market o2 sensors have the same colored wires as the vehicle. Also most o2 sensors have electrical plugs? If you need help finding the right o2 sensor for your vehicle then please dont be affraid to ask!

yel/red battery(always hot),wht/blue hot w/ignition,red/blk hot w/lighting switch,blk ground,red/grn rt ft +,brn/blk rt ft -,blue/grn lt ft +,gry/blk lt ft -, blue/yel rt rr +,gry/whte rt rr -,red/yel lt rr +, brn/whte lt rr -

Transmission range sensor, duty cycle evap/purge solenoid, radiator fan relay, a/c clutch relay, o2 sensor up/downstream relays, back up lamp switch.

http://www.lunghd.com/Tech_Articles/Electrical/1997_UP_Fuse_Identification.htm

If you have a factory amp, then here's the wiring:

blu/yel 12volts
gry 12volts key on
pink, violet left front spkr
grn, blu rt frt spkr
blk, yel Lt rr spkr
red, wht rt rr spkr
brn ground

If no amp, then:

blk/red pwr ant.
gry 12v key on
blu/yel 12v
wht/grn and grn interior lights (dimmer)
speaker colors same as above
brn ground

Note, these are for 97 camry