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Discussion Starter · #1 ·
I have a Harmar Power chair chairlift. I had no problems getting the power to the lift from the battery. Where the difficulties start is when I plug the two prong license plate light plug into the four prong receptacle. I then get a message that I am towing a trailer and the side proximity warnings have been disabled. Is there another way to get power to the license plate light on the lift so that I can use the proximity sensors? (Picture blurry, but gives an idea of the setup I have.)

2016 FE Titanium
Factory hitch and lights
2.0 Ecoboost
Car Wheel Tire Vehicle Vehicle registration plate
 

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Tap into one of the taillight wires and just add a ground or tap into one of those too. That's what the two wires are that your plugging into the trailer light plug. One is the taillight and one is the ground. .
 

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Discussion Starter · #3 ·
Tapping into the tail light wires threw a warning code of a light bulb failure. Is there any fuse connection in the rear that is key activated I could tap into?
 

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Try switching the license plate bulb or bulbs on the carrier to LED's. Depending on how much power the sensor takes, it may solve the bulb out fault. Basically the car thinks the taillight is now drawing too much power and is blown out, so the car is shutting power to that light. With LED's installed on the trailer, I can run an entire set of trailer lights (over 6 multi diode lights) on my vehicle using one taillight wire.

As for alternatives, get a multi tester or similar tester and start poking around. That's the best way to find fuse tap options. Hopefully there is one in the rear fuse box that will serve your purposes.
 

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Discussion Starter · #5 ·
UPDATE: I did as 02fordsvt suggested and put LEDs on the carrier. No bulb out fault, or proximity sensor warning. All is good. Thank you for the help. BTW: if anyone is wondering, the running light wires on the driver's side are: Hot-purple/green Ground-black/white.
 
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