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92 lexus 02 sensors wire diagram question

Hi, i have 2 new in the box 2002 FORD Taurus precat 02's.
2 white wires
1 black
1 grey

i have a an old 92 Lexus sc 400 with 175K on the car and the pre cat 02's are bad.
2 black wires
1 white
1 blue.

I wish to solder in the new o2s that i have and keep the car goin'. I plan to pull the efi fuse, solder them up and see the check engine light go away. I know for a fact the pre cat o2's are the problem. A dealer diagnosed this. The resistance readings between the 2 black wires on the old 02's reads 6.5 ohms on the 200 scale.

the new in the box 02's for the taurs read (between the two white wires) read 3.5 using the same scale. I wish to solder /merge the two and would like to know which wires go with what. I believe the twin whites on the new 02's and the twin blacks on the old are the heater wires. I'd appreciate your help, can't find wire diagrams very easy online....maybe you could assist with a good website as well? thanks!

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Re: 92 lexus 02 sensors wire diagram question

I just checked the ford's..3 liter,12 valve....i see car has four o2's and all identical with heater inside.. i also found the lexus....i tried attaching a screen shot of each wiring..but size limits prohibit...i looked at wire colors...they don't agree ford to ford and lexus to lexus nor cross breed colors...on lexus are four pins..
pin 1 is heater
pin 2 is battery pos (looks like other end of heater filament)
pin 3 is sensor out
pin 4 is ground (possibly sensor)

on ford...
pin 1 is battery pos (looks like other end of heater filament)
pin 2 is heater
pin 3 is sensor out
pin 4 is sensor out

hope this helps...

Posted on Nov 11, 2007

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How to install jensen 40w+40w a-80

I have one of these new, in the box, with no instructions.

Power Output: 40W/Chan Maximum, 18W/Chan RMS
(20hz-20khz into 4 ohms at less than 1% THD)
Freq. Responce: 20hz-30khz, +/-3dB
Signal to noise ratio: 80dB, A-weighted
Input Sensitivity:
Low Level, 100-500 mV
High Level, 1-5v
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Low Level, 10k ohms
High Level, 27 ohms
Load Impedence: 4-8 ohms allowable (4-8 ohm speakers)
Power Requirement: 14.4v DC (10.8-15.6 allowable)

As you can see the RMS wattage output of these units is only about 18W maximum.

I am planning on using the amp I have on a low power factory car radio. A low power factory radio output should be somewhere between 6-12 watts rms/channel. I will be using the "High Level" inputs for this. DO NOT connect a radio with a higher output power. If your radio says "High Power", 25W/channel, etc, do not connect to this amp. (exception: you can use the "line out" connectors, if so equipped, See Below). I don't have the connector for the high level input so i don't know what I'll do to hook up to it. I'll probably just run wires out of the amp, in lieu of the connector.

The "Low Level" inputs are for an unamplified, line level signal ("line out" connection of a radio, portable CD player, etc). Do Not connect a greatly amplified signal to these connections.

I don't know much about the "Input Sensitivity" control (pot). I'll be leaving it on "Low" for my initial test.

The grey wires are the right speaker wires and the white wires are the left speaker wires. The grey wire with a black tracer mark is the right speaker positive (+) wire. The white wire with a black tracer is the left speaker positive (+) wire.

The blue/white wire is for attachment to your radio's "Auto Ant" (power antenna) connection (usually a orange wire, I said USUALLY). If you have a power antenna on your car, simply splice into the wire running from your radio to the antenna. This blue/white wire activates a relay in the amp which, in turn, completes the circuit through the yellow (+) power wire (See Below). - Alternative 1: You could run this wire directly to your battery with a switch to turn the amp on. You would need to place an in-line fuse of 2amp. - Alternative 2: You could connect this wire to the accessory fuse in your fuse box. If this is done, again, attach a 2amp in-line fuse for extra protection. (Note: if attached to your fuse box accessory fuse, the amp will be on even if you're not using the radio. You could have a switch here also). These are just suggestions. The most common way to connect the blue/white wire is the "Auto Antenna" wire of your radio.

The large black wire is main Ground (-) for the amp. The large yellow wire is Positive (+) power to the amp. Ideally, these should be connected straight to your battery's (+) and (-) terminals. The yellow wire on your amp should have an integral in-line fuse holder with a 7amp fuse. If not, add one. Of course, the black ground wire could simply be attached under a screw, into the body of the vehicle.

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Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
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