Radiators
Buick Regal
2000-2005 Dodge & Plymouth Neons
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What would cause a 1996 Bick regal to overheat The radiator fan does not turn on?

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2009-06-20 15:32:16
2009-06-20 15:32:16

Check the radiator fans to see that they spin freely and they are not stuck. Assuming this and the electrical wiring is good, there is a thermal switch or sensor and a relay that turns on the radiator fan motors.

A quick check to of the fan motors can be performed by starting the car and engaging the air conditioning. This should turn on the fans.

If not, the relay itself is likely bad. These take a beating for use and heavy current demand. The relay is probably in the fuse box.

If the fans run, then a coolant sensor or switch or its wiring could be At Fault.

I have not worked on a 96 Regal but GM vehicles are similar across years in how the cooling system is loop monitored and controlled and one of the loops is not dependent upon the car's computer to operate. The 'dumb' loop has sensors or switches to failsafe in high temperatures, but they all depend on the relay to energize the fans.

Focus your suspicion on this loop.

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