How to Wire a 7-Way Trailer Connector to a 2005 Chevy Silverado
Question:
the hopkins trailer replacement has 3 small wires, the truck has 4 small wires 2 of them are green 1 light green 1 dark green,
asked by: Clem
Expert Reply:
It sounds like you have found the bundle under the rear of your 2005 Chevy Silverado that would be used for wiring up a 7-way. In the bundle of wires, look for the following colors:
Yellow = left turn and brake light
Dark Green = right turn and brake light
Brown = tail lights
White = ground
Light Blue = not used (camper shell light)
Light Green = reverse lights
The definitive way to determine the wire functions is to use a circuit tester, # PTW2993, and test each wire while someone sits in the Suburban and runs through each function. The brake output wire and 12 volt power wire will not be present and will need to be run manually. The 12 volt wire will attach to the positive battery terminal via a 40 amp circuit breaker, # PK54540. The brake wire will attach to the blue wire of a brake controller. You can use wire # 10-2-1 and you will need about 25 feet worth.
The functions for a vehicle side 7-Way, if looking at the back of the plug where the wires connect, is:
1 oclock position = tail lights
3 oclock position = left turn and brake
5 oclock position = ground
7 oclock position = brake output
9 oclock position = right turn and brake
11 oclock position = 12 volt power
center = reverse lights
There may also be some connections that need to be made under the hood with you have a functioning 12 volt wire at the back and/or brake output wire. I have attached an FAQ article for you to view.
Products Referenced in This Question
Deka Jacketed 2 Wire, 10 Gauge, Brake Wire - per Foot
- Wiring
- Wire
- Jacketed Wire
- 2 Wire
- 10 Gauge
- Deka
more information >
Pollak Circuit Breaker - Cycling/Automatic Reset - 40 Amp - Straight Mount Bracket
- Accessories and Parts
- Wiring
- Circuit Breaker
- 40 Amp
- Pollak
more information >
Product Page this Question was Asked From
7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket - Vehicle End
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- No Converter
- Custom Fit
- 7 Round - Blade
- 4 Flat
- Hopkins
more information >
Featured Help Information
Instructions
Miscellaneous Media
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on Custom Fit Vehicle Wiring
Raj
3/16/2020
I have a 2007 Chevy Silverado 3500 2wd classic. I don’t have any wiring under the truck for my trailer plug. What do i need to do to wire up a trailer plug with brake controller?