I installed my LS1 fans fall of last year. Figure I would post some pictures. Made my own harness and mounted the relays on the PCM cover. The reason I mounted the relays on the cover is for simplicity and the ability of being about to remove the fans without hassling with the relays. I used a slightly modified version of the +05 factory wiring diagram (shown below). The only difference is the two fuse blocks. I wired in two manual override switches and two leds. When I flip the left switch the fans come on low (green led on). When I flip the right switch only the passenger fan comes on high (red led on). Both switches flipped cases both fans to come on high (green and red led on). My PCM has been tuned (Thanks Justin) for the fans, so I no longer have to manual switch the fans. Hopefully all goes good this summer. (knock on wood)

 

What kind of relays are those and where did you get them? They are really clean looking.

 

Relays plus relay plugs from "Parts Express".

 

Man, those relay plugs are sweet, Ive never heard of those before. I just ordered several to fix my under hood relays and make them look cleaner. Thanks

 

I know this thread is "old" but I'm hoping you have larger versions of those diagrams that I can print out to reference & that I can read them? I can read most of the text, but not all of it. Just wanna make sure that there is nothing in the text that I NEED to know. Thanks!