LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

3 relay cooling system question

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Old 02-13-2004, 08:41 AM
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3 relay cooling system question

On a 3 relay system, does one burned fan motor going south prevents the operation of the other at low speed?

Found a bad fan, relay and fusilble link- oh I love doing automotive electrical...

-CAL
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Old 02-13-2004, 09:14 AM
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On low, the fans operate in series, so if the connection was interrupted to one (motor burned out), the other would not work.
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Old 02-13-2004, 09:15 AM
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This thing gives me a headache just looking at it, but it may help you out some.


Cooling Fan Schematics


Edit: Or just look up.
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Old 02-13-2004, 10:12 AM
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Well I did the fancy LED light Fan Mod from the several posts in here and abroad, good directions but was not a very reliable setup even with top notch components, switches, etc. So I tried just jumping the relay...well on a 97 at least that resulted in one fan spinning super slow while the other was on high and car would run the norm 210 or whatever. PCM Tuning after my engine install was the #1 Key and I'd highly recommend it over a switch now. My temp never reaches over 170 on a hot day sitting at a light for 10 minutes.
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Old 02-13-2004, 04:12 PM
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Originally posted by DonHood
This thing gives me a headache just looking at it, but it may help you out some.


Cooling Fan Schematics


Edit: Or just look up.
Don, I wore that thing out last nice



Thanks guys.

Last edited by Luna; 02-13-2004 at 04:16 PM.
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