Brake Light Switch Wire Color on a 2018 Ford F-150

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Question:

I will be installing the Roadmaster Universal Brake Monitor Item # RM-9530. Do you have a recommendation on the best place I could connect the 12V power supply, and ground wire to on a 2018 F150

asked by: Lonny

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Expert Reply:

The cold side of the brake light switch on your 2018 Ford F-150 should be a purple/white wire but I really encourage you to test it with a circuit tester.

expert reply by: Conner L

0

Lonny

11/14/2018

I will be installing the Roadmaster Universal Brake Monitor Item # RM-9530. Do you have a recommendation on the best place I could connect the 12V power supply, and ground wire to on a 2018 F150

Reply

Conner L.

11/14/2018

The best way to power the Roadmaster Universal Brake Monitor part # RM-9530 would be to attach it directly to the vehicle's 12 volt battery. However, this requires routing the wire through the firewall which is not always the easiest method so Roadmaster provides a fuse tap for you. There is an interior fuse panel on the passenger side of your 2018 Ford F-150 that you can use the fuse tap on. However, in order to find out which circuit remains active while the vehicle is in tow mode you would need to test them with a circuit tester. The monitor only draws 2 amps max so power consumption won't be an issue. There should also be multiple ground studs in the footwell area but as we have not physically installed this device on an 2018 F-150, I do not have exact locations unfortunately.

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Answer 1

The Demco Classic Base Plate Kit #DM68FR will replace the front tow hooks on your 2022 Ford F-350 Super Duty so the larger air dam below the front bumper won't be an issue when it comes to fitment. I'm attaching some photos from the linked…

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Answer 2

When you are hardwiring a trailer brake controller like the Prodigy P2 #90885 the red wire connection that provides the triggering signal to the controller should be made to the wire on the COLD SIDE of the brake light switch circuit. This is the…

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Answer 3

If you have a Ford or Lincoln that has a neutral tow kit or if your car has a push-button start feature that will not start the engine when the brake fuse is removed, then you need to perform a normally closed installation which involves using a…

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Answer 4

I assume you want to have the lights work as they have with the truck attached and then you want to be able to turn the lights on when the trailer is not attached to the truck. I have attached a drawing that shows how the wiring can be run to give…

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Answer 5

The BrakeBuddy Towed Vehicle Battery Charge Kit part #BB54FR comes with a the Brake Buddy Select 3 Portable Supplemental Braking System part #HM39524. I have attached a wiring diagram of how this is setup with the Brake Buddy.

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Answer 6

Normally you can find the brake light switch under the dashboard at the top of the brake pedal. There could be a number of wires attached to the switch so you can use a tester like part #PTW2993 to test the wires. Since the auto manufacturers can use…

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Answer 7

In order to use the Demco Classic Base Plate Kit with a Blue Ox Tow Bar you will simply need the Adapter for Blue Ox Tow Bars to Demco Classic Base Plates part #DM9523034 which works with all Blue Ox motorhome mounted tow bars like the Avail part…

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Answer 8

According to my contact at Demco, you can use the Adapter for Blue Ox Tow Bars to Demco Classic Base Plates part #DM9523034 to attach the Blue Ox Avail Tow Bar part #BX7420 to a set of Demco Classic Base Plates like part #DM9517335.

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Answer 9

When it comes to choosing between the Blue Ox Patriot #BLU37TR and the Brake Buddy Select 3 #HM39524, these systems are extremely similar in their setup and functionality. Both of these systems provide proportional braking in a compact and easy to…

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Answer 10

Hey Christian, welcome to the world of RV-ing! So in addition to the Roadmaster Nighthawk #RM-676 you're also goin to need: - A baseplate kit, like the Roadmaster Direct-Connect Base Plate Kit #RM-521453-5. These attach to the Jeep itself so you…

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Answer 11

Hi Russ; you pretty much have everything you need right there with the exception of a few parts. I'm going to go ahead and list it all out here with links to make it easy for your to manage. You will need the following: -etrailer Invisible Base…

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Answer 12

Hey Ed! It looks like you put together a great list of parts. I'm going to list everything out here with links so it is all in one place, including my suggestions. For a complete setup you will need the following: -etrailer Invisible Base Plate…

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Brake Light Switch Wire Color on a 2018 Ford F-150

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