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07-01-2024, 10:04 AM
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Registered User
Join Date: Nov 2000
Location: Wheatfield IN, USA
Posts: 1,124
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Vintage AC and kicking on fans
Have a K5 blazer with a complete Vintage Air A/C kit installed.
Blazer has a LS3 with dual electric fans – fans run through the emc/pcm and are set to come on at 165 then kick off tcm speed has reached 30mph. My question is how do I wire my fans to kick on and stay on when the AC switch is activated? There is no way in the pcm/ecm programming to do this. Concern is overheating/ pressurizing the high side of the compressor when there is no airflow ( for instance upon startup or sitting in traffic ) before the fans activate
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1972 K5 - LS3/408 (595Hp) -6L80e-One Tons with 4.56, 20'' Beadlocks with 37'' rubber, full TMI interior, JL Audio ..... 1971 CREWMAX Build.....at body shop for couple more years 
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