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Aug 16, 2011 | 08:33 PM

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From: la porte TX

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non ls cooling question

my neighbor has a late 90s or so chevy cavalier. he is having a problem with it over heating. he said his fan was not coming on but when he hooked the battery straight to it it would kick on. I told him i would check his thermo first. but does anyone have any ideas. If the thermostat was closed, would the computer still send a signal to turn the fan on?

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Aug 16, 2011 | 08:53 PM

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From: South Florida

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Quote:

Originally Posted by drago1217

my neighbor has a late 90s or so chevy cavalier. he is having a problem with it over heating. he said his fan was not coming on but when he hooked the battery straight to it it would kick on. I told him i would check his thermo first. but does anyone have any ideas. If the thermostat was closed, would the computer still send a signal to turn the fan on?

T-stats are not linked to PCM's. They are mechanical and operate by temperature.

Check the fan relay/fuses.

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Aug 16, 2011 | 08:56 PM

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Yeah that's what I thought. He already checked them. They work fine. He tried turning on his ac also to get his fan to come o with no luck

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Aug 16, 2011 | 09:10 PM

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Possible PCM failure.......or maybe an issue in the fuse box where the relays are. I'm no electrical expert, but check the currents going through those relay slots.

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90s, cavalier, fan, late, located, relay, switch

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