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What is an aparasitic draw?

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Anonymous

15y ago
Updated: 8/18/2019

Parasitic draw is in reference to electrical loss as Parasitic loss is in reference to horsepower loss through accessories that run off the drive belt that comes off the 'crank' of the engine such as the water pump, cooling fan, a/c compressor, Power Steering pump, super charger etc..

Parasitic loss in electrical is refered to a loss of electrical power when the vehicle engine is not running and the ignition is off. this could be a door ajar causing the interior light to remain on causing a electrical draw(parasitic loss) of the battery. Eventually causing the battery to die.

Most causes of electrical loss are not this simple and require at times hours to track down. Fastest way I know is to unplug your vehicle harness in sections while having a meter monitoring the battery amps.

Depending on the vehicle, a vehicle may have up to .050 amps of parasitic draw from items such as clock and radio memories, any more than that and you will have battery prolems if the vehicle is not run for several days.

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Wiki User

15y ago

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