How to Inspect Ground Circuit of Trailer Wiring

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Question:

Hi! Ive ready some of your other posts and they stated to check your ground wire b/c the amperage may not be high enough. How do I check the ground wire and make it have significant enough amperage to use give the 7-way trailer signal and break lights. I have running lights Thank you!

asked by: Janean

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Expert Reply:

Trailer lights ground in a couple ways. Sometimes they ground through the mounting hardware which basically means it's ground through the trailer frame to the ground wire of the 7-way connector or they lights are grounded with a wire that runs back to the trailer connector directly. Since the stoplight/turn signals aren't working it's most likely related to the main ground harness of the trailer connector. On the connector in the 5:00 pin position is the ground circuit. Make sure it's connected to either the lights directly or ran cleanly to the frame of the trailer directly.

I also attached a couple help articles on trailer wiring troubleshooting for you to check out as well.

expert reply by: Jameson C

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Answer 1

I have not yet personally heard of this issue on the 2019 Ram 2500 but the error messages you are describing sound like the trailer connection point is not very secure and bumps in the road are causing the pins to lose contact with the terminals. The…

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Answer 2

Yes, the 12 Volt auxiliary terminal (red) on your 7-way connector can be used to keep the battery on your trailer charged. You will need to run a 10 gauge power wire like #10-1-1 from the 12 volt auxiliary terminal on the 7-Way trailer connector on…

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Answer 3

Since your trailer lights are getting some power even when the trailer is not hitched and not connected to the tow vehicle wiring this tell us that one of the batteries on the trailer, either the auxiliary battery for the lights or the breakaway…

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Answer 4

We have run into this quite a few times in the past, and the best option will be replacing the Lance 7-pin connector with a standard 7-way blade connector like the #PK12706. This will give you a standard 7-way connector to plug into the factory 7-way…

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Answer 5

Lance does have a proprietary plug, but many customers see a standard 6-way or 7-way round and notice it doesn't fit their factory 7-way as well. I've attached an article to help if you have one of the 7-way or 6-way round connectors which we…

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Answer 6

A junction box/7-way plug kit like Epicord #277-000141 or #HS381-9000 lets you convert the camper to match the 7-way RV blade type connector format. This avoids the extra connection points and potential trouble spots from using separate adapters.…

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Answer 7

Hey Bob, great question. It was about 7 degrees here in Missouri this morning, so I can relate to the cold. I do have a good solution for this too. What I would do is replace your current 7-way cord with the Curt Cold Weather 7-Way RV Style Connector…

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Answer 8

Electric tongue jacks like the Electric Jack w/ Footplate - A-Frame - 25-1/8" Lift - 3.5K - Black #EJ-3520-BBX are designed to use a 12v power so if you want constant power I recommend using a trailer battery for connection. If you only want…

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Answer 9

Hello Ken, thanks for reaching out. Sadly, the Furrion Vision S camera system is being discontinued and replaced with the Vision S+. The camera for the Vision S+ is not backwards compatible with the Vision S system, so sadly if your camera is bad,…

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Answer 10

The Demco Hydraulic Trailer Brake Actuator part #DM72VR should be a direct replacement for the Atwood 61101 Brake Actuator that you have now. This newest updated it rated at 7K instead of 6K. This is a bolt on option that mounts on 3" centers.…

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How to Inspect Ground Circuit of Trailer Wiring

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