Have you ever started a wiring project, only to have it come to a screeching-halt, because you searched and searched all over the INTERNET, to try and find the correct schematic. Speed Scene Wiring has done it again. They have made a universal “skeleton key” schematic system that provides all of the information you’ll need to service, modify or build a LS, LT or TPI harness. So, if your ready to get started, click on the desired file, for example “TPI Builder Info 1989” – fill out the registration, and log in. You will have access to way-more data than you need but stay calm, membership has its privileges, just drop us an email if you need something that you don’t see. We’ve got your back!