Checking Tow Light Wiring Fuse on 2020 Toyota Highlander
Updated 06/02/2026 | Published 08/26/2020
Question:
Easy connect, good fit, but no power to the flat four. No action on voltmeter on any of the 3 circuits when vehicle lights on. Thought it was great that my 2020 Highlander had the connector behind the bumper but......
asked by: Bruce D
Expert Reply:
The most likely issue is a blown or missing fuse for the trailer lighting. Locate the fuse panel under the hood, on the driver's side, near the fender. Your Owner's Manual can additionally provide you a picture of the location and instructions for opening it. Locate position 15 in the panel and determine if the fuse is missing or blown. I have attached a picture showing the location of that fuse in the panel.
Continue Researching
- Shop: Trailer Wiring
- Shop: Trailer Hitch
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Q&A: No Lights After Installing Trailer Plug On 2021 Toyota Highlander With Tow Package
- Video: Clean Up Your Trailer Wiring
- Search Results: 4 pole tester
- Search Results: 4 pole bracket
- Search Results: 18136 mount bracket
- Search Results: 4 pole mounting bracket
- Shop: Suspension Enhancement
- Shop: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
- Shop: SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle
- Video: Malone Horizontal 1 Kayak Work/Storage Stand Feature Review
- Video: Hands-On with the Brophy Circuit Tester for 4-Pole Flat Trailer Connector
- Video: Curt No-Drill Bracket Review
- Video: What to Know About the Brophy Circuit Tester for 4-Pole Flat Trailer Connector
- Video: An In-Depth Look at the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package-C55245
- Search Results: a frame
- Shop: B&W Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Video: Installation Guide for the Curt Trailer Hitch Receiver on a 2020 Toyota Highlander
- Shop: Curt No-Drill Bracket for 6-Way or 7-Way Round Trailer Connector Mounting Bracket - Long
- Shop: Curt No-Drill Bracket for 4-, 5-, or 6-Way Trailer Connector Mounting Brackets - Short
- Shop: Brophy Circuit Tester for 4-Pole Flat Trailer Connector
- Q&A: Do I Install a 10 Amp or 30 Amp Fuse for Trailer Lights in the Fuse Box for a 2013 Toyota Highlander
- Search Results: ask an expert
- Search Results: curt trailer wiring
- Q&A: Torque Specs for 9/16" Trailer Axle U-Bolts
- Shop: Fifth Wheel Hitch
- Q&A: Does Curt Trailer Wiring Harness Really Fit 2026 Toyota Grand Highlander without Tow Package
- Q&A: How To Find The Trailer Lighting Fuse In The Fuse Box Of A 2020 Toyota Highlander
Marlin
5/30/2025
The fuse box is not numbered as advised. The owners manual has no useful information about fuses , nor is the any tlr turn (left or right) ,nor trl light, trl stop abb on under hood fuse box cover. Nothing helpful or bad fuses. Checked factory connector under rear bumper and found no vdc. Geesh! How about a bread crumb of real useful information Toyota!