Furrion 7-Way Adapter Power With Headlights Off

Updated 08/27/2026 | Published 08/22/2026

Question:

Does the furrion 7 way adaptor power your trailer lights/cameras if your headlights are off and car is running?

asked by: Michael S

Expert Reply:

Welcome back Michael. The 7-Way Vehicle Power Adapter # FR87PR takes the vehicle’s PWM/insufficient running-light signal and provides a steady 12V supply so Furrion cameras can operate properly. The tow vehicle lights still need to be powered on to energize the circuit. So if the headlights/running lights are off, a camera wired into the trailer’s lights will be off as well.

Is there a specific camera system you are looking at?

expert reply by: Christopher H

Stanley J.

8/25/2026

No it does not. You need to have at least your running lights on for it to have power.

Christopher H.

8/26/2026

@StanleyJ That's what we have found as well. What type of vehicle do you have?

Randy

8/26/2026

I need correct my previous response… I said headlights need be on, which works, but you need to have at least your running lights on for it to have power. Headlights or running lights work

Christopher H.

8/27/2026

@Randy Appreciate the update!

Richard B.

8/25/2026

You can run camera with marker lights

Christopher H.

8/26/2026

@RichardB Thanks for sharing! What year, make, and model of vehicle do you have?

Bob N.

8/26/2026

Good question. My trailer lights have been staying on whenever the 7 pin cable is connected, even with the truck off! It drained both truck batteries when we did not unhitch and I left the cables connected. I wondered what has changed! The RV is in the shop today for inspection and replacing an awning cover. I will test it by removing the adapter when we get the vehicle back. The Furrion camera only works with the adapter connected. I use the Furrion as a rear-view mirror while driving. The Furrion works better than the GMC camera which has too wide of a field of view. A 2021 GMC 3500HD Denali.

Christopher H.

8/26/2026

@BobN Like you mentioned above, I'd be curious if you remove the adapter and hook up the trailer do the trailer lights remain on with the ignition off?

Bob N.

8/27/2026

@ChristopherH Got the RV back this morning and ran the test. The trailer marker lights stay on with the engine off and the 7 pin connected through the Furrion adapter. Removed the adapter and the marker lights are off.

Christopher H.

8/27/2026

@BobN Interesting! The fix here is obviously to remove the adapter when not in use but I hadn't heard of this drawing power with the ignition off. This is simple enough to remove but you could also hardwire in a PWM filter like # VGR64VR.

See All (5) Replies to Bob N. ∨

8/26/2026

AS Richard B has suggested, your rear view camera will function with only the marker lights on.

Christopher H.

8/26/2026

@Jd Appreciate you jumping in. I'm asking everybody so what type of vehicle do you have?

8/27/2026

@ChristopherH 2022 Chev 2500 HD Product used to connect a Furrion 7

Christopher H.

8/27/2026

@Jd Thanks for sharing!

See All (5) Replies to Jd ∨

Randy

8/26/2026

No, headlights need to be on for that adapter to work. It works great when lights are on.

Christopher H.

8/27/2026

@Randy Appreciate the feedback here! What is your tow vehicle?

Randy

8/27/2026

@ChristopherH Sorry, thought I sent this already...My tow vehicles that I successfully use the adapter is a 2024 GMC Sierra AT4 2500HD, and a 2023 Mercedes GLE350.

Bob N.

8/27/2026

@Randy I agree that the headlights need to be on for the camera to work. The interesting thing is that the marker lights stay on if the adapter in line with the 7 pin connector.