Troubleshooting Pre-Collision Warning After Installing Brake Controller on 2018 Toyota Highlander
Question:
After installing the Tekonsha P3 on my 2018 Toyota Highlander, I receive a Pre-Collision System Malfunction when using the slide switch.
asked by: Pier
0
Expert Reply:
The issue is the wire you ran the red wire of the P3 part # 90195 to. We've heard from Tekonsha that a 1 amp diode needs to install on this circuit to prevent the controller from backfeeding onto the vehicle wiring. Or you can use the part # RM-690 from us. The "IN" side would point towards the vehicle.
I attached an install video of a brake controller to this page on a 2018 Highlander for you to check out as well.
expert reply by:
Jameson C
0
Products Referenced in This Question
Roadmaster Single Park Light Diode
- Accessories and Parts
- Tow Bar Wiring
- Diodes
- Roadmaster
more information >
Product Page this Question was Asked From
Tekonsha Prodigy P3 Trailer Brake Controller - 1 to 4 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Electric over Hydraulic
- Automatic Leveling
- Under-Dash Box
- Dash Mount
- Up to 4 Axles
- LCD Display
- Up to 360 Degrees
- Tekonsha
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Brake Controller
- Shop: Roadmaster Single Park Light Diode
- Shop: Trailer Wiring
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Shop: Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter - 7 Way Trailer Connector
- Video: Roadmaster Single Park Light Diode Installation - 2003 Jeep Wrangler
- Search Results: etbc7l
- Search Results: rm~690
- Search Results: etbc7
- Search Results: pigtail wiring harness
- Search Results: tekonsha
- Search Results: tekonsha pigtail
- Search Results: no drill mount bracket
- Video: Roadmaster Single Park Light Diode Installation - 2016 Hyundai Elantra
- Video: Roadmaster Single Park Light Diode Installation - 2012 Jeep Grand Cherokee
- Video: Curt Echo Mobile Trailer Brake Controller Installation - 2019 Toyota Highlander
- Video: Best 2018 Toyota Highlander Trailer Wiring Options
- Video: Choosing the Right Brake Controller
- Video: Tekonsha Prodigy P3 Trailer Brake Controller Installation - 2019 Toyota Highlander
- Q&A: Recommended Diode for 2017 Toyota Highlander To Prevent Lane Departure and PreCollision Dash Warning
- Q&A: Why Is Pigtail Wiring Harness with Diode for Brake Controllers Required for a 2019 Toyota Highlander
- Q&A: ABS Error Warning Light on 2018 Toyota Highlander When Installing Trailer Brake Controller
- Q&A: How To Determine if the 2018 Toyota Highlander Has A Tow Package For Trailer Wiring
- Q&A: What is Towing Capacity for 2018 Toyota Highlander Limited
- Q&A: Fix For Curt Echo Wireless Brake Controller Locking Up Trailer Brakes At Low Speeds
- Q&A: How To Find Stop Light Switch Wire On 2019 Toyota Highlander for Trailer Brake Controller
- Article: Determining Trailer Tongue Weight
- Article: 5 Things to Know About Weight Distribution Hitches
- Shop: 7-Way RV Upgrade Kit for Trailer Brake Controller Installation - 12 Gauge Wires
- Shop: No-Drill Mount Bracket, Long