Wiring Diagram Needed for Installing a 7-Way on a 2005 Chevrolet Silverado

Updated 11/12/2021 | Published 05/03/2018

Question:

wiring diagram for a vehicle end trailer connector7 Pin for a 2005 Chev Silverado 1500

asked by: Jim K

Helpful Expert Reply:

When hardwiring a 7-Way to your 2005 Chevrolet Silverado, like part # PK12-707E, you will want to connect the following functions to the following pin locations:

1 o'clock - 12V Power
3 o'clock - Right Turn/Stop
5 o'clock - Brake Controller Output
7 o'clock - Ground
9 o'clock - Left Turn/Stop
11 o'clock - Tail and Running Lights
Center - Reverse Lights

I have attached a diagram showing these functions as well. Please note that the colors in the diagram are typical wire colors for those functions but that does not mean those are the colors of the wires for your Silverado. If you are unsure what any functions are you can use a circuit tester like part # 3808 to help you with the installation.

expert reply by: Jon G

click to enlarge

Testing C.

11/1/2021

05 Silvado, multimeter leads: black to ground, red to 11:00 (running lights). I have no voltage at that pin only with light switch in the on position. Truck lights work. Cannot find a fuse for just trailer running/marker lights. Any help greatly appreciated

Les D.

11/2/2021

@TestingC Yes, the 11 o'clock position is the running lights which will only have power with the truck running lights on. When the trailer is hitched to the truck with the engine running and headlights on, do your trailer running lights work?

Testing C.

11/12/2021

@LesD Yeah I read the OM, particularly the part about fuse pnls, especially the underwood pnl. The one marked Trlr Pkng lts stood out like a sore thumb.