Hopkins Custom Fit Vehicle Wiring - 31156
Hopkins Fifth Wheel and Gooseneck Trailer Hitch Wiring Harness
- Harness is extra-long to help reach truck bed
- Simply plugs into OEM wiring harness
- Vehicle must have factory tow package
- No cutting or splicing
- Wire Pigtail Ends
- Fits the following vehicles with a factory installed 7-way trailer connector
- 1999-2010 GM Full Size Pickups
- 1999-2002 pickups require the factory installed tow package with 7-way connector
- 2003 and newer GM trucks do not need the factory installed 7-way connector
Customers Who Purchased This Custom Fit Vehicle Wiring Also Bought...
Ask the Experts about this Hopkins Custom Fit Vehicle Wiring
Do you have a question about this Custom Fit Vehicle Wiring?
- Parts Need for Installing a 7-Way in the Bed of a 2008 GMC Sierra 2500HD for Fifth Wheel Towing
- Since your 2008 GMC Sierra 2500 has a tow package, you would use part # 31156 to place wiring in your truck bed for fifth wheel/gooseneck towing. You would also need an in-bed 7-Way like part #20027.
view full answer...
- Can I use Fifth Wheel/Goosneck Trailer Harness Part # 31156 for my Slide-In Camper Wiring
- The tail lights and marker lights should not run off the battery inside the camper. They should pull signal from the trailer connector.
If you have signal and proper functions at the 7-Way connector at the rear of the vehicle, then the Fifth Wheel/Gooseneck harness you ordered, part # 31156, should solve your problem. Make sure to use a circuit tester, like part # 3808, when you go to wire everything. The camper wiring may not be color code matched to the wiring harness you purchased.
The
view full answer...
- Powering Camper With 7-Way On Bumper, Have Battery Isolation Relay, Will It Draw Down Main Battery
- If your battery isolation relay is installed properly it will only draw from the main battery when it is reading current from the alternator or when vehicle key is in the ON position. When your vehicle is OFF it should only be drawing current from the auxiliary battery.
We do have a Two Battery Universal Isolator Kit, # 12023A-D, that will give you the proper current control to each battery.
view full answer...
- Pin Locations for the Hopkins Fifth Wheel/Gooseneck Harness
- I went out into our warehouse and pulled a Fifth Wheel / Gooseneck Trailer Hitch Wiring Harness # 31156 to check the wiring placement of the wires and here is what I found:
On the male side with the clip part in the relative 12 o clock position the connector wires as follows:
11:00 yellow wire, left turn and blinker
1:00 brown wire, tail and running lights
3:00 red wire, 12 volt accessory (this is the port you will need for charging a battery)
5:00 green wire, right turn and brake
7:00
view full answer... 
