When your trailer brake lights or turn signals work poorly or dont operate make sure your hitch wiring is in good condition. In case its faulty and requires replacement dont lose your time going from one store to another as you will find a huge range of top notch gmc sierra hitch wiring from leading brands here.
This is accomplished by tapping into the tow vehicles electrical harness to transfer power to the trailer wiring system.
You can find out more Diagram below
Trailer wiring diagram gmc. I have also included a trailer wiring faq page for you to check out. By law trailer lighting must be connected into the tow vehicles wiring system to provide trailer running lights turn signals and brake lights. Lowest price trailer wiring guarantee.
Guaranteed fit gmc sierra trailer wiring. See the picture to the right for a wiring diagram of seven way vehicle end trailer connector. If you click on it you can enlarge it.
4 auxiliary center wire what is this usually used for. Various connectors are available from four to seven pins that allow for the transfer of power for the lighting as well as auxiliary functions such as an electric trailer brake controller backup lights or a 12v power supply for a winch or interior trailer lights. Trailer connectors are used between the two to allow disengagement when not.
5 extra wire in behind the hitch mounted plug coming from the harness is another thin wire with an unique end on it covered with a rubber protective cap. Installation instructions and lifetime expert support on all purchases of 2004 gmc sierra trailer wiring. I would like to use it for back up lights which i installed on my trailer but was wondering what it is usually for.
Thousands of customer trailer wiring reviews expert tips and recommendation. If you are working on your trailer wiring i also encourage you to look at the. This video demonstrates the chevrolet silverado complete wiring diagrams and details of the wiring harness.
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