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Old 04-22-2020, 02:05 PM   #1
bearcat77's Avatar
Join Date: Mar 2019
Location: Fairfield Ohio
Posts: 64
2019 Ford F-350 side mirror wiring

I have a 2019 F-350 Lariat with the power fold, heated, tow mirrors. I want to tie in some led running board lights. The running board lights have the courtesy on-fade off feature, along with constant on, and sequential turn signals. I need to find the parking lights wire, the ground wire, the turn signal wire, and the door assist light wire. There must be 20 different wires feeding into the mirror and I canít find a current Ford wiring diagram to save my life. I will attempt to get a multimeter and check wire by wire if I need to, but Iím hoping someone has already attempted this and can name the four magic wires for me. Thanks!
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Old 04-22-2020, 02:10 PM   #2
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Location: Joppa, MD
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Have you looked at the Ford Truck forum? You'll most likely get more responses there.
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
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Old 04-22-2020, 02:36 PM   #3
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Join Date: Jul 2017
Location: Muskegon
Posts: 357
In order to have running and turn signals on the running boards remember you'll need dual element bulbs. If you simply buy marker lights they will only be one or the other. here's a shot of my truck at night. With mine being a dually I tapped into the wiring for the fender marker light
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07 GMC CC LB dually LBZ, Idaho Rob EFI, DeeZee boards, 50 gal TransferFlow inbed tank
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ford, wiring

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