Shownomercy

iTrader: (1)

Got most of the harness done last night, big thanks to 95mysticta

I need to re-arrange the data signal lead wires, last thing I need to do at this point. Since the tan wire from D (blue) 30 on the LT1 pcm feeds the ALDL port postion 9 on a stock LT1 setup...

Rather than run new wires and check pin continuity, can I just switch the tan wire from port 9 to port 2 on the aldl and then run the tan lead to pin LS1 Blue 58?

That should work correct? Would not be OEM color coded but it would work?

Thanks guys

S10Wildside

In this case I would not use one circuit as another. While you did not mention the year of your car (schematics are sometimes different from year to year), that TAN wire may be part of the Electronic Brake Control Module (EBCM) and should not see Class 2 data from the LS1 PCM.

Shownomercy

iTrader: (1)

Sorry, 1995 car, just talked to you on the phone lol

The tan wire you mentioned gets deleted from use on the LS1 pcm, so I figured I could save myself the trouble of running a new wire and re use it.

S10Wildside

That TAN wire is connected to the EBCM in your car. Do not also connect it to the LS1 PCM.

Shownomercy

iTrader: (1)

Ok sounds good, so the tan wire is def deleted then and will not attach to the PCM anywhere?

I will run the supplied purple wire to the data port in some manner.

S10Wildside

From the PCM to connector C105, the TAN wire goes away.

Shownomercy

iTrader: (1)

Ok pulled that out and put the purple wire as a place hold for now from blue 58 to C230 K. I will check teh car side of things tmmr if the rain ever stops.

On a semi related note, short of throwing the harness on a engine, is there any way to run some checks on it to see if I messed up anywhere?

S10Wildside

Do a continuity check with a digital multimeter.

95mysticta

iTrader: (4)

You should be able to find a search in either my harness repin or lethalbirds thread of what wires can be deleted as you flip through the pages. I dont have my notes on me to tell you for sure which wires were deleted and cant be used in the ls1 pcm.

Shownomercy

iTrader: (1)

Yea thats what I used to figure a few of the odds and ends left out on the LS1 swap chart.

Pulling the harness all apart tonight and may lay in out on the spare motor. Sucks I won't know if it all works or not for a while

Shownomercy

iTrader: (1)

Been pulling out leads that I did not pin into the LS1 pcm, and so far everything was good to go verified as emmisions or similar.

I am looking at the C105 connector.


The only wire I have on this connector is the pink feed for injectors, the other stuff I removed.

This seem correct?

95mysticta

iTrader: (4)

SLOW DOWN!

You do not need to remove any wires from that C105 connector. You just have to trace that wire through the harness which leads up and splits off from the stock lt1 coil power and something else i forgot right now. You just need to splice your coil power wires into that large gauge pink wire. I personally left just enough wire off the stock lt1 coil wire and spliced my ls coil power into it and been mint. I dont know why your pulling the rest of the wires from that c105 connectior

Shownomercy

iTrader: (1)

Well its all stuff I am not using.

Traction Control system spark retard
Traction Control TPS
Serial data signal
Traction Control Active

None of that stuff is going on the car and I read that the LS1 can't do LT1 traction control anyways. Thats all from C105

Edit:
https://ls1tech.com/forums/15763362-post85.html

and see in this pic, only one pink wire at C105
https://ls1tech.com/forums/15764886-post89.html

95mysticta

iTrader: (4)

Serial data is used. I know for mine i had to splice in the tan serial data wire into the purple wire on the aldl connector being mine was a 94 with the old obd1 connector.

Shownomercy

iTrader: (1)

From the stuff above from Mike, I am taking Pin 58 BLUE and taking the lead the kit gave to C230 K position. (its for a torque converter control on V6 cars so its an empty port) And then running a line on the cabin side to feed the data bus pin 2

I am fairly certain he said the tan lead for LT1 data signal was not used on the engine harness side.

S10Wildside

Do not splice the LS1 PCMs Class 2 data signal into this TAN wire...unless there is nothing else on the TAN wire (like the EBCM).

As I've mentioned in several other threads...
- 93 is different than 94-97
- 94 is different than 93 and 95-97
- 95 is different than 93-94 and 96-97
- 96-97 is different than 93-95

S10Wildside

You will remove all but the wire in cavity B of connector C105 (which is used as fused 12V ignition for four of the fuel injectors). All other wires have nowhere to go in the LS1 PCM.

A 1994 car does not have connector C105.

S10Wildside

To clarify...
The 1995 LT1 car's dash harness, in anticipation of 1996 OBDII compliance??, has the Class 2 data wire in Diagnostic Link Connector (DLC) cavity 2 and then connector C230 cavity K (which mates to the PCM harness). The PCM harness side of C230 cavity K is empty. So if you are doing an OBDII conversion (an LS1 PCM swap is an OBDII conversion), then you can simply run LS1 PCM BLUE connector cavity 58 to C230 cavity K to bring the data stream to the DLC.

Mention of the V6 torque converter clutch in C230 cavity K just adds confusion. It's V6 car only and unrelated to the LT1 car.

...but if someone wanted to do it the hard way, then run a wire from the PCM to the DLC.

THIS IS ALL UNIQUE TO A 1995 LT1 F-BODY

95mysticta

iTrader: (4)

I do not have my notes handy as stated i did this over the winter and im sure i cant remember all of what i did. I did however in my 94 wire the tan to the purple wire as its different years matching. Car runs mint and tunning has gone without a hitch aswell as putting a scanner onto it.