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Old 10-26-2010, 09:35 PM
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cooling fans

i am trying to install some electric fans in my el camino i bought them from some guy he said they came from a camaro but dont see how to wire them one motor has two wires one white n the other one black. the other fan also has two wires one black n the other one is blue or green. can anyone help

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Old 10-26-2010, 09:47 PM
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The Black's are probably grounds, check continuity with a V/O meter.
May have been setup for Hi & Lo temp, both for Hi Temp or A/C, 1 for Lo Temp.
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Old 10-26-2010, 11:03 PM
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so no idea on how to hook it up or the best way to do so
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Old 10-27-2010, 07:24 AM
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First general information; hook up the fan; using a jumper; the fan will run clockwise or counter clockwise depending how it is wired. To change direction reverse the wires. Once you determine the direction of airflow desired the next step is to wire a control circuit. That is accomplished using a relay;temp sensor and a few feet of wire. Not hard at all.

Connect one wire of the fans to ground and the other wire to one side of the relay contact; the other relay contact needs to have the supply voltage; B+ or battery; 12 volts with the key on.

The coil side of the relay is wired this way; from the temp sensor to one of the relay coil terminals; the other coil terminal can be terminated to the same; supply voltage; B+ or battery; 12 volts with the key on; as mentioned above.

You also can run a jumper on the back of the relay from the coil to that hot terminal used for the supply voltage of the fan circuit.


How it works;

Key on; 12 volts @ relay coil and on one side of the relay contact

temp sensor comes to temperature and supplies a ground to the relay coil; causes the relay to energize; closes the contact; contact closed supplies 12 volts to fans and fans cool
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Old 10-31-2010, 01:51 PM
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This diagram should help.
See attached.

vicrod
Attached Files
File Type: pdf 2 fans 1 sensor .pdf (212.8 KB, 111 views)
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Old 10-31-2010, 10:27 PM
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thanks for all the info it works great i want to thank everyone
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Old 11-25-2010, 02:35 AM
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you can get nifty temperature operated fan controllers at the parts store for cheap. i have two of them in my '72 monte. one is designed to run two fans, it turns on the small fan, and the turns the large fan on 'low' when it comes on around 200F.. I set it that high because the fans toggling on and off at traffic lights was getting annoying. with my t-stat at 190, I can usually sit through a short light w/o the fans coming on.. and if they do come on.. they stay on.
the 2nd temp controller runs the big fan's high speed. that's set for 220F as a 'just in case' situation.. since that fan is CRAZY loud, and pulls huge amounts of current. nearly 30A continuous, and over 60A turn on surge.
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