Troubleshooting Curt Spectrum Brake Controller - No Lights On Control Knob

Updated 02/03/2025 | Published 10/01/2023

Products Featured in This Question

Curt Spectrum Trailer Brake Controller - Dash Mounted Knob - Up to 4 Axles - Proportional

(450)

$269.95

Question:

Good Morning, 2022 Silverado Custom 2.7l crew cab Curt Spectrum Brake controller issue. No lights at control knob. Attached pic is of quick connect wiring. I also have the curt connection to vehicle adapter. All trailer lights work when plug is attached but controller does not light up. Please help Thanks

asked by: Alan V

Expert Reply:

The Curt Spectrum Brake Controller # C51170 should illuminate, even if the trailer is not connected. If you are getting no lights at all, this likely means the control unit is mis wired, or there is contamination in the trailer plug socket. We recommend double checking your wiring and making sure everything is done correctly. Also clean and dry your trailer plug.

I have included Curts troubleshooting guide below.

expert reply by: Jesse M

Curt Spectrum Troubleshooting Guide
(click to enlarge)

Robert

1/31/2025

Is there a fuse that goes to this setup

Jesse M.

2/3/2025

@Robert Hello. The Curt Spectrum Trailer Brake Controller # C51170 does not include a fuse. Your vehicle may have a fuse for the trailer brake power circuit, but that depends what vehicle you have.

Robert

2/3/2025

@JesseM Jesse we have a 2023 Chevy pickup 1500