both fan wires are hot..

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Old Jul 20, 2010 | 07:33 AM
  #1  
ninty1civic's Avatar
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From: baltimore
Default both fan wires are hot..

Okay so i searched high an low.. dont tell me to use google..

I have a 91 si hatch.. Its bone stock except i removed the AC and now my fan hasnt been working..

I read a while back somewhere that the radiator fan and condensor fan work together when the ac is engaged..

basically both of the fan wires are hot and i cant figure out how to correct this..

i think that the fan timer in an ac equiped car is different than that of non-ac car.

Help a brother out..
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Old Jul 20, 2010 | 08:52 AM
  #2  
Rand The Man's Avatar
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From: Chicago
Default Re: both fan wires are hot..

Bad relay? Blown Fuse? I Have a on going fan problem myself..... Bought my car from some moron that just had the relay off with the wrong fan for my Rex in it and it wasn't even working.... So I just jumped it with 2 wires my fan runs all the time now. Well up until this morning I'm about to go screw with my car in a minute pretty sure its either a blown fuse for me or the fan burnt up or the wires are loose... Let me know if this helped ya!
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Old Jul 20, 2010 | 09:18 AM
  #3  
gringo7718's Avatar
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From: MIAMI
Default Re: both fan wires are hot..

Basically there is a coolant temp switch on the back of the block, that when it gets to up to temp, it grounds out one of the wires. This neg - wire goes to the fan relay and operates the relay, sending power to the fan.

When you say both the fan wires are "hot", do you mean you tested and both the wires show 12V+ power? (One of the fan wires should show ground at all times, the 12V power should turn on and off.)

Are they getting power all the time or just when you put the key in the ignition?
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Old Jul 22, 2010 | 08:44 PM
  #4  
ninty1civic's Avatar
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From: baltimore
Default Re: both fan wires are hot..

Originally Posted by gringo7718
Basically there is a coolant temp switch on the back of the block, that when it gets to up to temp, it grounds out one of the wires. This neg - wire goes to the fan relay and operates the relay, sending power to the fan.

When you say both the fan wires are "hot", do you mean you tested and both the wires show 12V+ power? (One of the fan wires should show ground at all times, the 12V power should turn on and off.)

Are they getting power all the time or just when you put the key in the ignition?


Yea when i said hot i meant positive.. The reason they were hot is because i had the cts bypassed and the relay wasnt workin..

And i actually didnt check if they were hot while the car is off, cuz i already knew that the fan should be on if the key is on and the cts is bypassed..

I switched the relay with another and it fixed it.. lol
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