Recommended Solution to Add Trailer Wiring to Ambulance with 3 Wire Lighting

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Question:

We have an ambulance here that has separate turn signals and turn/brake light fixtures. We need a T one type set for a trailer hook up. that will allow for the turn signals and brake/stop lights to work on a trailer. Please help

asked by: Bob

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Expert Reply:

I have a solution for you, but there is not a T-One style connector for this, so you'll need to hard wire the trailering wiring in. With that said you can use the Upgraded Circuit Protected Tail Light Converter with 4-Pole Flat Trailer Connector # 119178 which will convert a 3 wire system on the tow vehicle to a 2 wire for towing a trailer. We've even got a video of this being installed on a Ford chassis ambulance that you can use as a guide for installation that I've linked to this answer.

expert reply by: Erik B

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Answer 1

In the USA a tandem axle utility trailer with a gross vehicle weight rating (GVWR) of 7500-lbs should have brakes installed. Any trailer over 3000-lbs must have brakes on all wheels in most states, but laws do vary. Some states require braked axles…

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Answer 2

For your 2017 Thor Axis 25.3 Rv Ford E-350 chassis I recommend the Roadmaster Front Anti-Sway Bar Item #RM-1139-176 This will vastly minimize sway and driver fatigue by improving the stability and driveability of your Ford E-Series chassis. The bar…

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Answer 3

The Timbren Front Suspension Enhancement System part #TFEF350 is rated at 3,000 lbs and the Timbren Front Suspension Enhancement System part #TFEF350UH is rated at 6,000 lbs. I was able to call the manufacturer to confirm this. They will both fit…

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Answer 4

The mounting holes the Curt Trailer Hitch Receiver #14053 measure 38-1/4" (for the 4 rearmost) and 38-3/4" (for the 1 forward-most) and then from the edge of the receiver that measurement is either 4-1/2" or 17-3/4" depending on…

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Answer 5

Brake controllers such as the P3 you referenced #90195 will go into a sleep mode after about 15 minutes of it sensing no movement. If you peek through the window after 15 minutes then it should be in sleep mode. Opening the door or causing movement…

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Answer 6

The P3 brake controller, #90195, will go into a sort of sleep mode after it detects no movement for 15 minutes. While it is on it does not draw very much power. What you can do to make sure it goes to sleep is exit the truck after turning it off,…

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Answer 7

The Curt Trailer Hitch Receiver - Custom Fit - Class IV - 2" #14053 is a confirmed fit for the Ford Full Size Van but it is not a fit for a cab and chassis like you have which has a slightly wider frame. My recommendation due to the weight you…

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Answer 8

I went out into our warehouse to measure the mounting flange of the Curt Hitch part #14053 that you referenced and found it to be 15-1/8 inches long.

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Answer 9

We do carry universal hitches that are rated for 10,000 pounds and above, like the Draw-Tite part #41990-07. I've linked the selection. With that being said a lot of times when a motorhome is rated for 5,000 pounds towing it isn't the hitch…

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