LS13.5

Ive read the other threads, but I think Im having a little more trouble than they are since Im also using a 2003 (Blue/Green) Harness into a 2001 (0411 Blue/Red) PCM

Its a 5.3 Turbo going into an S13 (240sx)


Ok... So I am only using the front two O2 Sensors (Bank 1 Sensor 1 and Bank2 Sensor 1)

They are the 4 Pin Black Housing...
I've found the spots for all the wires except for both the Ground Wires.

They originally came out of Pin 72 and 74 (From a Blue/Green PCM)

When I look at the pinouts for the 0411 PCM those two spots are "not used".

Does that mean they wont act as grounds? Or will ground, just werent used on cars that came with 0411s since the wiring was different?
Would I be able to just splice them into another set of ground pins from like the coils or something like that?



So long story short... Where do the ground wires go for the front O2 Sensors when using a Blue/Green harness in a Blue/Red PCM?

Thanks guys.

PS... Ive already read this article like 5 times today, its where Ive gotten a lot of my info on the swap along with a lot of the LS1tech threads... http://www.lt1swap.com/cable_conversion.htm

LS1MCSS

iTrader: (18)

Will this help?

busta9876

iTrader: (3)

on the 99 to 02 red/blue computer, the ONLY two wires that go from o2 sensor to the PCM are the TAN and PURPLE. The Heater GROUND and POWER come from ground terminal on block and fuse block for key hot 12v+ power.

Keep in mind, only the FLAT 4 pin o2 sensors used in some 99 to 02 5.3's are CASE grounded.. If you use ISOLATED ground sensor, you must tie the tan wires from both o2 sensors and the PCM TAN wire locations to a common ground reference.

LS13.5

This is what I read on the lt1swap page that is always referred to.

But reading comprehension owns me...

is this...



what it should be looking like?
Or should they all be tied together?
Feel free to mod the amazing artwork, it would get through to me a lot clearer with a simple pic as opposed to the words which tend to get jumbled up in my head for the most part lol

busta9876

iTrader: (3)

the factory wiring for ISOLATED GROUND o2 sensors, ties all the TANS together into a splice, then runs a wire to a GROUND REFERENCE from the PCM.



The wire at C1 BLUE pin 63 IS the ground reference.

There are a few GROUND REFERENCES in the C1 connector you can use, any of them will work. C1 BLUE pin 23 you will likely already have in a 2003+ harness, and it just went to the C2 under-hood connector anyhow, you can use this wire to splice into BOTH tan wires for a ground reference.

LS13.5

My pinout diagram says that pin 63 is "not used".

So i understand that I just take my tan wires from the 2 O2 sensors Ill be using and splice em together. And since you said there are plenty of "low reference"s on my pcm, I can just wire it in with one of them and Ill be good?

Thanks for dealing with my stupidity lol Ive noticed youve walked A LOT of peeople through in the threads ive read on here, glad you stopped by here too haha

NoClassic

iTrader: (42)

Word of caution.

LS13.5 sold a T56 on a chassis specific forum and never delivered or shipped the part.

It has been nearly 2 months since the sale and he is now ignoring all contact attempts by the buyer.

He has basically stolen upwards of $1200 dollars.

RhdRicheeee

It was $1500.00 actually

BUYERS BEWARE!