how to make an LLY bench harness?

[DURAtotheMAX]

Alright I have all the parts. Got an ALDL/DLC/OBD2 port out of a wrecked blazer, got TCM connectors, and just got an ECM C1 connector for 30 bucks at the dealer.

Now I just need to know how to wire them together. EFILive talks on Class II, not J1939 CAN right? SO I dont need to worry about the CAN/J1939 wires on the TCM and ECM connectors right? I think I only need to do the Class II wires. What wires are what on the ALDL port? I dont have a schematic for that so I dont know whats power, data, ground etc... As I said I hvae ECM and TCM pinouts, but I dont know which wires hook up where on the ALDL port so my bench harness will work.

Any ideas Ross or Paul?

Ben

[DURAtotheMAX]

Here is the message that has just been posted:
***************
LLY only

OBD2/ connector Blue ECM connector

Pin 2 Pin 16=serial data
Pin 4+5 Pin 8=ground
Pin 16 Pin 5=battery


Works for me. Use at your own risk.


I saw Trippin posted this....but on my ECM charts, it shows Pin 8 as being LOW REFERENCE. Pin 9 is ground... also dont you need switched ignition wires hooked up so you can wake up the ECM??

Ben

[Trippin]

I was going off some notes and wanted to reverify on my ECM before I left it up there. Something bugged me about it after I posted it so I deleted it.


LLY only

OBD2/ connector --------Blue ECM connector

Pin 2 --------------------Pin 16=serial data
Pin 4+5 ------------------Pin 8=ground
Pin 16 -------------------Pin 5+ Pin 10=battery

So once again I have many reflashes using a harness built around this. Use at your own risk.

Technically, ECM pin 10 is the Ign feed.

[DURAtotheMAX]

alright so If I want to have a fancy switch on there I can just switch the battery+ wire right? I dont need to switch the IGN wire?

thanks Trippin!!!

btw I got that C1 connector at the dealer...30 bucks haha.. I get a lot of my parts there so the guy gave it to me at his cost so that was good. Im making a master bench harness...radios, amps, IPC's, ECM's, TCM's.


...anyone know the pinouts for the TCM bench harness?

Ben

[Trippin]

Ben,

Can you give me the connector part #?

I have the TCM pinouts at home. I'll post them tonight.

FYI,

I can't take credit for this pinout info. It was provided to me by some very intelligent people at EFILive.

[DURAtotheMAX]

Trippin heres the ECM connector part number. This is a GM part number. SI2000 has the Delphi part number. It took some digging at the dealer to find the actual GM part number.

LLY ECM C1 BLUE connector: 88953346

about 35 bucks at the dealer


As far as TCM connectors, I dont know the GM part number. I pulled mine out of a wrecked Blazer for free. It just so happens that some of the Blazer PCM connectors are the same as the Ally TCM connectors.

[DURAtotheMAX]

Im making my master bench harness now. its gonna be the sweetest freakin thing ever!

[Biodiesel66]

Trippin heres the ECM connector part number. This is a GM part number. SI2000 has the Delphi part number. It took some digging at the dealer to find the actual GM part number.

LLY ECM C1 BLUE connector: 88953346

about 35 bucks at the dealer


As far as TCM connectors, I dont know the GM part number. I pulled mine out of a wrecked Blazer for free. It just so happens that some of the Blazer PCM connectors are the same as the Ally TCM connectors.

88953346 connector should work for the both LB7and LLY ECM? :?

I tried to get the part number from the dealer and had no luck. If this will work this will be great.

[Biodiesel66]

Trippin,

Do you have the pinouts for the LB7 ECM?

Not sure if this is correct pinout.

Pin 19 = Ign
Pin 20 = 12v
Pin 58 = Data
Pin 60 = Gnd

[Biodiesel66]

The connector you can get here http://www.gmpartsdirect.com/results.cfm for $23.58.