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Troubleshooting Ram 3,500 lb Trailer Tongue Jack Working Intermittently  

Updated 06/04/2019 | Published 06/03/2019

Question:

Hello, I had an issue with my factory installed Ram 3500lb Tongue jack where it was working intermittently. I checked all the connections and everything appeared secured and I opened up the jack cover and those connections looked good as well. I had the issue independent if I was running off the battery or if I was connected to the truck or 30amp at the campground. I was talking to a fellow camper at work and he had a similar issue and his camper dealer told him his jack had a thermal fuse in addition to the regular 30amp fuse. I havent been able to find any information to see if this is accurate. Do you know if this tongue jack comes with a thermal fuse or even an auto reset breaker which may act like a thermal fuse? Thanks.

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Expert Reply:

I reached out to my contact at Ram and he said that their electric jacks, like part # EJ-3520-BBX, # EJ-3520-WBX, or # EJ-3527-BBX have one fuse and it is located on the black wire where it enters the housing.

From what you described I believe your problem is a bad ground. These jacks ground through the mounting hardware so if the connection isn't solid and constant it can cause the issues you are having. What my contact recommended doing was taking some of the paint off of the trailer where the jack mounts to make sure that it has a clean metal-on-metal connection and this should take care of your issue.

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Jon G
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