That is the block heater plug. When it is plugged in the unit at the engine keeps the engine warm. This aids in starting the vehicle in cold weather. I wouldn't use it unless the temperature is going to be below 10F.
It's to heat your radiator should the temperature drop beyond normal winter conditions. Keeps it from cracking
My Jeep has an electrical plug coming out of the motor but it’s not plugged in. Can anyone tell me what’s it’s used for?
2010 Jeep Commander Sport 4WD
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General
What is the value of a used 2002 jeep commander?
Jeep Commander
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General
My husband was checking out our vehicle and noticed there is an electrical plug coming from the motor. Does anyone know what it’s for? It’s not plugged into anything.
2010 Jeep Commander Sport 4WD
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General
Does taking the car battery off and the main fuses reset the EMC?
2008 Jeep Commander Sport
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General
Why would my Jeep Commander, 07, suddenly show 60,000 more miles on the odometer. It has since changed back to the original miles.
2007 Jeep Commander Limited 4WD
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General
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