MarkoLBR

Hi ,

I´m a little lost in identifying some of the connectors on my 2002 truck engine harness.(5.3L L59 engine from a Suburban with PCM serv.no 12200411)
I pretty much got everything in a box , with some connectors hanging of the engine (not complete with accesories) unattached , so help would be very appreciated

I have attached some pictures of the harness and numbered the connectors I haven´t identified:

Tr_eng_harn_1.jpg
#1 Fuel composition sensor connector (Flexfuel engine)
#2 O2 sensor (Drivers side rear)
#3 PRNDL Switch
#4 PRNDL Switch
#5 O2 sensor (Drivers side front)

Tr_eng_harn_2.jpg
#1 ???

Tr_eng_harn_3.jpg
#1 AC Accumulator "Switch"
#2 Coolant level/temp???
#3 MAF connector
#4 O2 sensor (passenger side front)
#5 O2 sensor (passenger side rear)


Tr_eng_harn_4.jpg
#1 EVAP

Tr_eng_harn_5.jpg
(Bolts under in front of oilpan and goes to right side of engine , starter stuff , cranksensor etc)
#1 ??? (Has one black wire and one white)
#2 AC Compressor Coil
#3 AC


Thanks in advance.

Regards Marko

GA95DCMSS

iTrader: (13)

Tr_eng_harn_1.jpg
#1 Looks to be Crank POS sensor
#2 O2 sensor
#3 Park neutral position Switch
#4 Park neutral position Switch
#5 O2 sensor

Tr_eng_harn_2.jpg
#1 ?

Tr_eng_harn_3.jpg
#1 ?
#2 Coolant temp
#3 MAF Connector
#4 O2 sensor
#5 o2 sensor

Tr_eng_harn_4
#1 Cant see wire color, so by the connectors around it, I'd say knock sensor conn.

Tr_eng_harn_5
#1 EVAP
#2 AC Compressor
#3 AC

Don't Quote me on this, but without wire colors, I wont know for sure.

-Joseph-

iTrader: (12)

These are hard to ident. Double check with a service manual, it would help if it was partially installed on an engine:

Tr_eng_harn_1.jpg
#1 Not CPS - this connector is near the left side of the trans. crossmember, although I have never seen it before on a truck. Could be fuel related or transfer case?
#2 O2 sensor (Drivers side rear)
#3 PRNDL Switch
#4 PRNDL Switch
#5 O2 sensor (Drivers side front)

Tr_eng_harn_2.jpg
#1 ?

Tr_eng_harn_3.jpg
#1 AC Accumulator "Switch"
#2 Coolant Level - possibly
#3 MAF
#4 O2 sensor (passenger side front)
#5 O2 sensor (passenger side rear)

Tr_eng_harn_4
#1 This is located near the Throttle Body and Alternator, I believe it to be the Evap Solenoid on top of the intake. It -could- be CTS, but the wire doesn't appear long enough to reach.

Tr_eng_harn_5
#1 Don't remember this one
#2 AC Compressor Coil
#3 AC

MarkoLBR

Thanks for your replies.

I edited the first post with some more info and a better picture of Tr_eng_harn_5.jpg

The two PRNDL switch connectors (if correct) on Tr_eng_harn_1.jpg , were do they usually connect in the vehicle?
#3 has 6 wires , #4 has 4 wires (Seems like a lot of wires for that )
Also #1 seems to be odd , it´s not CPS.

If don´t identify the connectors the easy way with the help from you guys , guess I´ll just have to measure or take the harness apart.

Regards Marko

GA95DCMSS

iTrader: (13)

The PRNDL Switch connectors attach to a housing on the drivers side of the 4l60E.

I'm wondering what #1 is also...looks kinda out of place.

MarkoLBR

Hm , missed that one when I was searching/studying

I was using these links:

https://ls1tech.com/forums/conversio...-together.html

https://ls1tech.com/forums/conversio...swap-faqs.html

Thanks , Marko

Speartech

iTrader: (14)

Hard to tell from the pic but if #1 is a 3-wire connector, that's the fuel composition sensor connector for running E85 in a flex-fuel engine.

Old Geezer

iTrader: (3)

Spend a little cashola, [I think about $35.00] and susbscribe to ALLDATADIY.COM...
Use the yr of the engine, and you'll be able to see all the schematics, engine data, etc, and be able to print them off...

MarkoLBR

Hi ,

If you are refering to the Tr_eng_harn_1.jpg and #1 connector it has 3 wires - White/Pink/Black.
I can´t find the pinouts for that in the excel-file i downloaded in this thread:
https://ls1tech.com/forums/conversio...-together.html (Pcm differences.xls)

I have a PCM with serv.no 12200411 and identified it on this page:
http://chevythunder.com/LS1%20compon...Identification

So in the file "Pcm differences.xls" I´m looking at the listing for "Fbody 2001".


Input on the #1 connector in Tr_eng_harn_2.jpg , #1 connector in Tr_eng_harn_5.jpg (Should be located near the steering servo or something) , anyone?

Thanks

Regards Marko

Speartech

iTrader: (14)

Yes, White/Pink/Black are the correct colors for the Flex-fuel connector. That's item 1 in the 1st picture.

MarkoLBR

Ok , thanks.

I edit the first post again , still 2 connectors not identified , and one uncertain.

I marked them with bold question marks.

If someone has the info it would be very helpful , plan on starting to delete things I don´t need in the harness this weekend.

I suppose the right thing to do is to verify/measure everything before deleting

Thanks , Marko