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sitopons
User
Apr 2, 2010, 1:28 PM
Post #1 of 7
(1865 views)
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Radiator Fan
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Toyota Celica 1990...20 years already!!
1.6L 4cyl
180k
My radiator fan is not turning on!!! something is wrong with the circuitry however my fan is still good, so I decided to hot wire it. Will it be safe to connect the fan directly to the battery and set up a switch inside the car or could it damage the fan. I plan to turn on the fan once the temperature of the engine raises...
Thank you
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nickwarner
Veteran
/ Moderator
Apr 2, 2010, 3:37 PM
Post #2 of 7
(1859 views)
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If you're going to do it, make sure you have a fuse of the same rating in your harness. Most times when people do this they inevitably forget to turn it off and kill the battery, or forget to turn it on and overheat the engine. Might be worth checking this out to find the cause first and keep it factory. Probably something inexpensive to fix and would save a lot of hassle
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 3, 2010, 1:10 AM
Post #3 of 7
(1850 views)
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I'm with Nick on that - Just fix it the way it was intended. Not that expensive,
T
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re-tired
Veteran
/ Moderator
Apr 3, 2010, 2:11 PM
Post #4 of 7
(1842 views)
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To do the bypass right you can buy a aftermarket temp sensor that will either screw into eng or strap onto rad hose . wire in a relay with fused pwr on one side of contacts fan on other . 12v key on power to coil and other coil lead to ground. Guess what ? You just duplicated the factory system.The only exception to this is some that run the control circuits thru the ecm. Like the guys have said it can be done but check out the factory circuits first.
LIFE'S SHORT GO FISH
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GKOO
User
Apr 6, 2010, 8:52 PM
Post #5 of 7
(1825 views)
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its usually a fan switch or relay and they arent very high. and it might save you an overheat...gk
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Loren Champlain Sr
Veteran
/ Moderator
Apr 7, 2010, 7:20 PM
Post #7 of 7
(1809 views)
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 This is the coolant fan switch. Assuming that the cooling system is full, it is possible that the switch is faulty. I would rather see you repair the problem than 'Mickie Mouse' it. You can wire it as you suggested, and if you are determined to do it that way, I'd suggest using a 'keyed' power source (so that the fan only has power when the ignition is on) with a relay and a fuse. btw, it will cost more to do it that way than if it's just the switch at fault.
Loren
SW Washington
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