drago1217

iTrader: (6)

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?

LS6427

iTrader: (2)

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

Check the fan relay/fuses.

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drago1217

iTrader: (6)

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

LS6427

iTrader: (2)

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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