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Chevy Fans are Finicky

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Chevy Fans are Finicky

Owners of 2013 Chevy Impala vehicles may comment that the cooling fans do not run or that the fans run with the key off. This may be caused by sticking fan relays or cooling fan motors drawing too much amperage, sticking and causing damage to the relays and accessory wiring block.

Inspect the relays. If discoloration or distortion is found, replace the relays.

Inspect the accessory wiring block for signs of damage and replace if necessary. Inspect the tension in the wiring block for the cooling fan relays using 7114-4112-02 terminal from the terminal repair kit. If tension is loose, replace the wiring block.

Check cooling fan motor amp draw. Start the engine and warm to normal operating temperature and leave the engine running. Turn off the headlights and the HVAC fan. The starting amperage may be between 16-18 amps at this location with the engine running. When each fan is turned on, the reading will jump up. Note the amp reading.

Using a Tech 2, select Powertrain>Engine Control Output>Special Functions>Module Control>Cooling fan.

Turn on Relay 1, 2 and 3 to run both fans on high. The amp reading with both fans running may be between 55-60 amps.

Pull one relay and read the amps. Subtract the original reading (16-18 amps) from the total. This should be under 26 amps. Reinstall the relay, pull the second relay and repeat. If the fan motor(s) draw more than 26 amps, replace the fan motor(s).

P/N........................PART

22862311..............Block, accessory wiring

89018695..............Motor kit, engine cooling, LEFT

89018696..............Motor kit, engine cooling, RIGHT

89018691..............Blade kit, engine cooling, LEFT

89018693..............Blade kit, engine cooling, RIGHT

19116057.............Relay (quantity 2)

19116058.............Relay (quantity 1)

 

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