Troubleshooting Curt Trailer Wiring Kit for 2001 that Won't Power On
Updated 04/22/2025 | Published 04/21/2025
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Question:
I have a 2001 Tundra and recently purchased the Curt C55378. It isnt working after I installed it in my truck, but I believe the issue is on the truck side. The center pin on the Curt connection that plugs into my truck seems to connect to a black wire in the center of the trucks wiring harness. Should I be getting constant 12v power from that center pin/black wire when the truck is on/running? And if so Im not getting anything to that connection/wire... any chance you have a wiring diagram for an 01 Tundra or anything specific I should check? I already checked every single fuse in the truck... trucks lights work fine.
asked by: John M
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Expert Reply:
Hey John, yes the black wire pin on your 2001 Toyota Tundra should have 12 volt power on the Curt 4-way trailer wiring kit part # C55378 as this is what provides power for all of the trailer wiring circuits. If it's not active and you've checked all fuses and relays related to it then there's got to be some wiring issue on the truck for that circuit which will be challenging to track down. I would just run a wire from the battery directly and splice it in for the black wire and bypass all of that headache. We sell 12 gauge wire by the foot with the part # 12-1-1.
Product Page this Question was Asked From
Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- Powered Converter
- No Tow Package
- 4 Flat
- Plug and Lead
- Plug-In
- Visible
- CURT
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on Custom Fit Vehicle Wiring
John M.
4/22/2025
Should that be constant power or only when the key is turned on? I just want to make sure I'm not draining my battery when it's sitting?