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    1. #1
      Join Date
      Apr 2010
      Posts
      364
      Country Flag: United States

      LS3 Wiring Diagram

      I have a L76 crate with an LS3 top end (and a mild cam) that is going into a 69 firebird.

      Can someone help me out by providing this diagram? I pulled the following information off of the ECU.


      On the ECU, it says:

      GM Racing
      GM# 19258268
      Gr. 3.670
      GM Performance Parts LS376

      It's wired to mate to a T-56 Transmission

      With the harness is a pretty hefty fuse box. I couldn't find any telling ID numbers on the fuse box. It has four relays, a couple of 50 amp fuses, a couple of (i think) 30 amp fuses, and a bunch of ancillary fuses. (I'm trying to mate this harness to a Painless harness.)

      After being left out in the sun for a few hours, it appears the paper inside the fuse box has faded, rendering it un-readable. Does anyone have a photo of this?





      Full res photo:
      http://farm4.static.flickr.com/3222/...0b288052_o.jpg





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