LS1 Computer and Cooling Fan Question

[Phillip_L]

I posted last week that my car got hot because the fans quiet working.



Well, I found the problem and it is not pretty. Street and Performance build my entire harness and I had them add in relays to control the fans with the computer. I still do not completely understand what they did because they were using three relays to control two fans. Basically all three relays were receiving power from one 12 gauge wire and an even smaller ground. The 12 gauge power wire was discolored, splitting, and melted to the shrink wrap. The little ground wire was starting to do the same. When it went, it also melted part of the fuse box on the S&P harness and welded the fuse into the holder. I mention this so other with a S&P harness can beware.

Now to the real question: I am going to order a real harness for the fans from Ron Davis this morning. S&P was tying into two wires on the harness. What does each wire do? Is one a trigger from the A/C or are there two temperature settings in the computer (Hi/low) (two fans/one fan)?