Can Third Brake Light Power Wire be Used for Red Wire of Brake Controller Install
Updated 12/15/2025 | Published 11/16/2024
Question:
Hi. Im installing a brake controller on a 2024 RAV4 and I have a question about the brake controller red wire connection. The instructions say to tap into the cold side of the brake pedal switch. The pedal switch wire on this car is super small and Im afraid of braking it. Is it OK to tap into the brake light wire at the back of the car instead....to make the controller red wire brake switchfoot connection? Since Ill installing a T connector and running wires from the back to the front of the car anyway, this seems like a good alternative. And for me, it will actually be easier on this car. Thanks!
asked by: Dillin
Expert Reply:
Hey Dillin, this is a great question and also a great way to wire in your brake controller. If you want to use the third brake light power wire for the red wire of your brake controller that is perfectly acceptable!
Product Page this Question was Asked From
Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Accessories and Parts
- Trailer Brake Controller
- Installation Kits
- etrailer
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Jameson C.
12/15/2025
Hey Dillin, how did things go wiring the brake controller red wire to the third brake light on your RAV4? Your results could really help others who want an easier way to make that connection. Sharing what worked might guide someone tackling the same setup.