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 Posted: 01-25-2010 05:27 pm
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mcguan.2
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The electric fan that cools the radiator on my '73 has started running all the time when the key is in the on position.  The previous owner had installed a toggle switch on the dash that used to turn it on and off, but it also operated on a thermostat.  It used to go on by itself after the engine warmed up to a certain point. 

Any suggestions of where I should start my search to get it to not run constantly?  It's probably not the biggest problem, but today it kept me from hearing my fuel pump clicking away, and I drove off with a busted pump.  I didn't get far.

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 Posted: 01-25-2010 09:38 pm
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JHRV8
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WELL, SINCE IT WORKS ALL THE TIME, GROUND IS GOOD;  SO CHECK THE THERMOSTAT THAT CONTROLS THE FAN, REPLACE IF NECESSARY.  P.O. LIKELY HAD SAME PROBLEM ,HENCE THE SWITCH HE INSTALLED.      GOOD LUCK....JHRV8.

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 Posted: 01-26-2010 01:29 pm
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Brett Gibson JH5 20497
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Use a continuity tester.

When the engine is cold check to see if you have a completed circuit across the themostat, you should not have, as the engine heats up then it will become complete. Check your switch, again if you have a completed circuit in both positions it's NG.

Brett

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