How to Locate the Reverse Light Wire on the Back of a 2017 Toyota Highlander

Question

Question:

Im trying to figure out the best way to wire the blue wire for boat trailer surge brake release on my vehicle. The reverse light is in the lift gate which makes the wiring of a wire from there to the connector difficult. Is there a more direct connection to the reverse power wire somewhere in the harness at the rear of the vehicle, or another more convenient location? I have a 2017 Toyota Highlander, Limited trim package.

asked by: Danny C

0

Expert Reply:

The wiring harness for your taillights located in the rear hatch is ran at the top of the vehicle under the headliner. Therefore, the easiest way to access the reverse light circuit would involve tapping into the wire loom at the top of the hatch before it is hidden under the headliner. You should be connecting to a red wire for the reverse light circuit. You will want to use a circuit tester such as part # PTW2993 to be sure.

The best way to access the reverse light circuit is by removing the rear hatch cover's access panel and locating the reverse light wire at the back of the taillight assemblies.

expert reply by: Conner L

0

Greg

10/25/2024

How else can I find a wire at the rear of the car when the shifter is in reverse? I need it to de-activate a surge brake activator when I'm in reverse? Otherwise, the actuator acts as though I'm braking and applies the trailer brakes.

Robin H.

10/27/2024

@Greg the only way we have to find this wire is with a circuit tester as described above. If you are having trouble on your particular vehicle you might want to try asking a local dealer what the best location would be to tap into this wire. I went ahead and attached an installation video for our 5-way adapter # C57187 so you can see what the process is like. The other option would be to swap out your brakes with free-backing brakes which do not require a reverse lockout.

Helpful Links

tv-install-trailer-connector-adapter-2010-acura-mdx-c57187.aspx

Answer 1

The easiest way to find the reverse wire circuit is to use a circuit tester like part #PTW2993. If your back up light is a separate light at the rear of your Highlander, use the circuit tester to check the wire when the truck is in reverse. Have…

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Answer 2

When wiring a trailer connector, it is best to wire by function, as wire colors can vary. We have an excellent wiring diagram on our website, I will provide you a link so you can look at it. If you are looking at the inside of the trailer connector…

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Answer 3

The wiring of the Replacement Solenoid Valve #T4748800 is ran to the reverse light circuit of the trailer's wiring connector. Basically one wire will get run to the reverse light circuit and the other wire will get grounded on the trailer frame.…

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Answer 4

I'd try to find it near the rear of the vehicle where it feeds into the reverse lights since that's nearest where you'd have a trailer connector. Try to find the wires that run to the reverse light sockets of the taillights and test them…

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Answer 5

To find the reverse light circuit on a vehicle is pretty easy but it may take digging around in the door panels or interior panels of the vehicle. What you need to do is find the wires that lead into the reverse lights on your vehicle. Test both of…

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Answer 6

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

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Answer 7

Hey Manny, Even with a smaller trailer, it is not overkill and you can absolutely benefit using the Gen-Y Glyder Shock Absorbing Ball Mount for 2" Hitches #325-GH-12001. A trailer, regardless of size, is still going to be rigid, bounce, and…

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Answer 8

The Blue Ox #BX88177 consists of two 1/2 inch diameter and 2 5/8 inch diameter pins. They are only able to have the 4 keyed alike. The measurement is 4-3/8 inches between the opening like #BX88212 which cannot be keyed alike . The only option to get…

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Answer 9

Hi Vijay, Since you're wanting to go with a wireless brake controller you can use the Curt Trailer Connector Adapter #C57672 you were looking at and just cap off both the yellow and blue wires with some electrical tape. These can be saved for use…

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Answer 10

Since you have the factory tow package on your 2018 Jeep Wrangler Unlimited, the Hopkins Endurance Quick-Install 7-Way Trailer Connector #HM42190 will be an easy installation. The plug will be just behind the bumper and I've attached photos to…

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Answer 11

The B&W Tow & Stow 2-Ball Mount #BW29FR for your 2019 GMC Sierra 1500 with the Multipro tailgate, is designed to mount so close that there is no room for a system like the Rock Tamers #ERT00108. We do have the WeatherTech Mud Flaps #WT66MV…

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Answer 12

Yes, it will but you'll need a minimum of 2" between the edge of your hitch receiver and the back of the ball mount face. The etrailer Anti-Rattle Hitch Collar item #e38FV extends out 3/4" from the edge of your hitch receiver, this…

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How to Locate the Reverse Light Wire on the Back of a 2017 Toyota Highlander

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