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**First c10** · 05-30-2019, 12:54 AM

I think a trinary switch gives you 12+ when calling for fans so you will need a relay for a negative trigger for the cooling fans. Is this correct?

I think even with a trinary switch, the fans cycle when the ac compressor is engaged as soon as the pressure gets to the trinary fan set point and when it drops the fans turn off.

05-30-2019, 12:54 AM	#4
First c10 Registered User Join Date: Dec 2012 Location: Los Banos CA Posts: 2,706	Re: Gen IV & Vintage Air I think a trinary switch gives you 12+ when calling for fans so you will need a relay for a negative trigger for the cooling fans. Is this correct? I think even with a trinary switch, the fans cycle when the ac compressor is engaged as soon as the pressure gets to the trinary fan set point and when it drops the fans turn off. __________________ 1956 Chevy Bel Air 2 door 1956 Chevy 210 4 Door 1970 K20 LWB project the Hulk build w/Supercharged 4.8L-ly2/4L60E HULK BUILD 1970 C10 Yellow/White Deluxe LWB w/ 5.3L-LC9/6L80E 1968 K10 LWB Dark green my son calls it "THE HULK Jr"HULK JR SOLD GO GO!!!