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I own a 2015 ecoDiesel Longhorn


New Member
Feb 22, 2021
Truck Year
Hi folks! I know just enough about my vehicle to be dangerous. I was changing out my air filter and noticed a red switch that was disconnected on the passenger side under the hood directly under the windshield. Since I have been having issues with my passenger mirror retracting I thought maybe it had come unplugged and plugged that red switch back together. Apparently that didn't fix the mirror. Now I am concerned I may have plugged something in that shouldn't be plugged in. Does someone know what the red switch is? I have a photo here.


  • Red switch.jpg
    Red switch.jpg
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New Member
Sep 1, 2019
Truck Year
Could be the harness plug for the engine illumination light under the hood. Mine a 2018 didn't come with one. Ordered on Amazon and that's where I plugged it in.