Question about 1994 Pontiac Grand Prix

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Fans not running, it is overheating - 1994 Pontiac Grand Prix

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This is an electrical diag. if you don't know 12vdc, you need to find someone who does.

first thing I check is for 12v across the fan plug with the fan plugged in, engine running and a/c on. if very low or no volts: unplug fan, engine running and a/c on. if you have 12v, then you have a dead fan.

if low or no volts you have a power or ground problem.

Posted on Oct 04, 2009

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Some fans turn on only when they sense a certain coolant temperature...if you live in a very cold climate i doubt that it will ever come on...but when your stuck in traffic and on a real hot day, you should hear the fan go on.....sometimes fans will turn on by themselves when your working on the engine... keep hands away from the fan area. do you have a temp gauge? does it ever show that its in the red zone?...if it does and the fan is not running, Yes, its overheating and will soon damage your engine.

Posted on Oct 03, 2009

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