99+ LS1 PCM fan relay output - which one do I want?
03-21-2008, 10:54 AM
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99+ LS1 PCM fan relay output - which one do I want? I'm going to hook up my fan relay to turn my Nissan fans on using the LS1's computer butnot have a low and high speed like the f-body's. Do I want to use the low or high speed output from the LS1 PCM? I'm guessing the low speed would come on sooner, so this is the one to use, correct?
03-21-2008, 11:56 AM
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yeah, use the low speed to turn on the fans.
If you have two fans though, why don't you want to wire them up for two-speed operation like the F-body had? It's a pretty slick setup. I had originally planned to just do one fan for each PCM output, until I re-read the factory Z28 wiring diagram and figured out what they were doing with the 3rd fan relay (flipping from from series to parallel).
If you have two fans though, why don't you want to wire them up for two-speed operation like the F-body had? It's a pretty slick setup. I had originally planned to just do one fan for each PCM output, until I re-read the factory Z28 wiring diagram and figured out what they were doing with the 3rd fan relay (flipping from from series to parallel).
