Cory51191

Hello everybody.. I have been putting a ton of time into my C5. Just built an engine for it, swapped it, dropped it off for fabrication of the turbo manifold and cold piping, installed an external fuel system, installed an Alky control kit, etc, etc.

Anyways... This (below) throttle body harness was attached to my harness and I cannot find an OEM one to go back to the c5z throttle body which has 2 sensors on it (both female connections). Where can I find the section of the harness to convert this back?

https://www.texas-speed.com/p-1195-harness-adapter-for-ls2-throttle-body-on-ls1-vehicle.aspx

feeder82

try Mark at vettenuts.net

SG Lou

I'm at work and can't see the pictures thanks to our IT Dept. blocking file sharing sites but ..............as mentioned by feeder82 you can try Vettenuts. The ONLY thing I have found is a lot of places do not want to cut apart a full harness for one or two connectors.
You might get lucky and he'll have a partial harness that he can cut it away from.

Greg_E

I might be missing something here, but I thought the LS2 TB adapter harness just plugged into the two existing connectors for the LS1 TB and the third connector went to the LS2 TB. You should be able to remove the adapter harness and connect the existing harness to the LS1 TB.

Cory51191

I couldn't tell you because I've only seen it like this. But it looks like it's just a pigtail connector.

Cory51191

Found them on eBay through EFI Connection.
Anybody have pictures or can you take some of how it needs to be wired (c5z)??


http://www.ebay.com/itm/EFI-Connection-Throttle-Body-Motor-Connector-Pigtail-LS1-LS6-GM-/141364514965


http://www.ebay.com/itm/EFI-Connection-Throttle-Position-Sensor-Pigtail-LS1-LS6-GM-/131258289250

Greg_E

What I'm saying is that unless someone hacked up your wiring harness. all you should need to do is remove the LS2 adapter harness and plug the two connectors on the engine harness into the LS1 TB.

Cory51191

Well there's only 1 plug that the 2 connectors come from. I can't find that pigtail anywhere. Just the 2 connectors like i posted above but idk how its originally wired in.

Greg_E

The LS1/6 TB had 2 connectors. The LS2 had one.
In your first post you provided a link to the adapter harness sold by Texas Speed. Do you have that or not?
If yes: You can remove it and plug the two pin and six pin flat connectors on your engine harness back into the LS1/6 TB.
If no: Someone cut off the LS1/6 TB connectors and spliced in the LS2 TB connector. In that case you need the pigtails that you found on Ebay.

The Ebay links you provide for the pigtails show you what the wires are for, and they are color matched to your original wire harness.

Marc@Vettenuts.net

We have the LS1 to LS2 TB harness adapters on our site and also have any oem wiring that you may need us to cut a section off.