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Old 10-10-2010, 06:23 PM
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Eletric fan is not working

I am new to this wesite and to old cars so please take it easy on me! LOL. Anyway bought a 38 Chevy street rod (383 Chevy engine) a few years ago. Everything was fine until I was in a parade one day and the engine got REAL hot (about 210) due to the fan not kicking on. It always kicked on a 180 degrees but no more. Today I disconted the fan wires and put it to a old battery. It works so i would assume it is the sending untit of some sort. However I can not find anything that looks like it. I found one in the head on the left hand side with a wire going to it. Is this it or does this go to the guage? Who ever built the car did a real nice job on the wiring but it is so nice and wraped up its hard to tell what goes where. Any help out there? Thank You!!

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Old 10-10-2010, 06:50 PM
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You need to trace the wiring and see if a fuse blew or maybe a relay has gone bad.
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Old 10-10-2010, 07:16 PM
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Quote:
Originally Posted by edge
You need to trace the wiring and see if a fuse blew or maybe a relay has gone bad.
X2 , This is where i would start also.



Cole
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Old 10-10-2010, 07:21 PM
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Thanks guys! I did find one fuse,but it was fine(not burnt) Do think there could be a fuse closer to the guage like behind the dash? What actually makes this fan kick on?
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Old 10-10-2010, 08:24 PM
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THE RELAY THAT SUPPLIES THE POWER TO YOUR FAN SHOULD BE CONTROLLED BY A TEMPEATURE SWTCH. i WOULD CHECK THE RELAY AND THE TEMP SWITCH THE DRIVES THE RELAY COIL. MY GUESS IS WHEN LOOKING AT THESE TWO THINGS YOU WILL FIND THE PROBLEM
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Old 10-11-2010, 11:42 AM
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It could be a fuse, it could be a relay if one is used, and it could be the sender. You say you have a temp gage, then the sensor you see in the head maybe for the gage. The best way to tell is disconnect and see if the gage is effected.

Fans can be controlled two different ways, they can use a temp sensor just like the gage would have screwed into the block, or a sensor that slips into the radiator hose, figure out what controls the fan, ask the original owner if that is possible. I am including a link, look thought it and see if you see anything smiler to get started.

http://www.speedwaymotors.com/Street...r-Shrouds.html

Typically a fan sender provides a ground to turn on the fan, you can test the circuit , simply by removing the wire to the sender and ground it. That will turn on the fan, if the fan comes on it is a bad sender.

NOTE that is not the case with the gage circuit, so make sure you are working on the fan circuit. Grounding the gage wire would peg the gage, do not want to take a chance of hurting the delicate works of the gage.
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Old 10-11-2010, 04:28 PM
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The builder may have used a Centech Inc. model FC-2 fan controller. It is connected the existing temp. gage. Is adjustable and has a relay to power the fan.
www.centechwire.com

vicrod
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