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Recommended Flat Tow Wiring Kit For a 2021 Ford F-150 Lariat with LED Tail Lights.  

Question:

I am in need of a wiring harness for a towed vehicle with led lights. the vehicle is a 2021 Ford F150 Lariat. Can you advise of a wiring harness for this truck, Thank you in advance.

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Expert Reply:

I recommend the Roadmaster Universal Wiring Kit with Smart Diodes for Variable Voltage LED Tail Lights # RO44FR for flat towing your 2021 Ford F-150. These smart diodes are specifically designed to work with the LED tail lights on your F-150. Currently there is not a plug and play version available so the diodes will need to be spliced into the tail light wiring.

Your F-150 does require a Battery Charge Line Kit # RM-156-25 be used when you are flat towing. This will keep the battery from becoming drained while you are towing.

The Roadmaster 7-Wire to 6-Wire Flexo-Coil Kit # RM-146-7 will give you a coiled cable along with a 6-way connector that you can wire both the charge line and lighting. This will clean up your wiring connections into an easy connection.

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Bud M
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Instructions

Instructions for RM-156-25Instructions for RO44FRInstructions for C75WR

Miscellaneous Media

Instructions for RO44FR
Roadmaster Battery Charge Line Kit Installation - 2018 Ford F-150
Roadmaster Battery Charge Line Kit Installation - 2018 Ford F-150 - Video
Roadmaster Flexo-Coil Kit Review
Roadmaster Flexo-Coil Kit Review - Video
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