Jeffd Posted April 1, 2016 Report Share Posted April 1, 2016 Hey all, I have 2015 Dodge Ram 3500, dual 7 pin trailer plugs, one in bed, one on fender, when connected to trailer, dash shows trailer not connected. I used plug in 7 pin tester, applied full brake, brake light on tester won't light, pushed manual slider over, no light on tester. Repeated with Vdc tester at both plugs, no voltage. I do get a slight pulsing on meter (light, no voltage. Reading) ditto on tester plugged in. Is this definitely a truck controller problem? I have checked the fuses under hood. Thanks, hate to take it in. Quote Link to comment Share on other sites More sharing options...
Phil D Posted April 1, 2016 Report Share Posted April 1, 2016 Before taking it to the shop, check your Owner's Manual. There may be something as simple as a fuse or two that need to be inserted to enable full functionality of that circuit. If nothing simple or obvious like that can be found, then you're almost certainly going to have to take it to the dealer, since, with no voltage on the trailer brake wire in either socket, the trailer brake wiring circuit appears to be open. Quote Phil 2002 Teton Royal Aspen 2003 Kenworth T2000 - Cat C12 380/430 1450/1650, FreedomLine, 3.36 - TOTO . . . he's not in Kansas anymore. ET Air Hitch Link to comment Share on other sites More sharing options...
Cowdog353 Posted April 1, 2016 Report Share Posted April 1, 2016 What position is the gain control in? If you have it set at zero it may not show any voltage. Good luck Quote Link to comment Share on other sites More sharing options...
Jeffd Posted April 1, 2016 Author Report Share Posted April 1, 2016 Thanks to both I have gain set at 10 and slider full over, no signal to tester or voltage to meter, I'll recheck fuses them bite the bullet and go to dealer Quote Link to comment Share on other sites More sharing options...
bobsallyh Posted April 1, 2016 Report Share Posted April 1, 2016 Is this the first time you plugged the trailer in to this truck? Quote Link to comment Share on other sites More sharing options...
Jeffd Posted April 1, 2016 Author Report Share Posted April 1, 2016 Yes it is the first time plugging into trailer but I stopped at dealer where I bough truck today and they had a trailer on site they offered to plug into, the truck turned out to be fine, the comments on needing a load attached were correct, the controller worked fine hooked to different trailer, I'll start checking the trailer pins, I have a new cord for trailer and I'll start looking for continuity to brakes, thanks all for the help, I'll post what I found out. First time rv'er so it's a good chance for me to learn the systems.(doesn't hurt I'm retired and got te time) Quote Link to comment Share on other sites More sharing options...
Hewhoknowslittle Posted April 2, 2016 Report Share Posted April 2, 2016 Does your trailer have disc brakes? if so you might need a Cam adapter to make it work, I did on my Chevy. If it has electric drum brakes you will not need the adapter. Roger Quote Link to comment Share on other sites More sharing options...
Truckman Posted April 3, 2016 Report Share Posted April 3, 2016 Does your trailer have disc brakes? if so you might need a Cam adapter to make it work, I did on my Chevy. If it has electric drum brakes you will not need the adapter. Roger New Rams don't have that problem, at least no one I know of, myself included. Quote Link to comment Share on other sites More sharing options...
marspec2003 Posted April 22, 2016 Report Share Posted April 22, 2016 Don't know about Rams but my Ford controller has to be set to either drum or disc brakes. Quote Chuck & LolaWVRetired USCG 2013 Ford F450/2013 Lifestyle 37RESL Link to comment Share on other sites More sharing options...
Kevin H Posted April 22, 2016 Report Share Posted April 22, 2016 Don't know about the 2015 Rams, but my 2011 is weird in that it must be moving before it will send a signal to the brakes. Nothing registers on a tester unless the truck is in motion. Try plugging in yours and see what happens when the truck is in motion. Quote The richest are not those who have the most, but those who need the least. Link to comment Share on other sites More sharing options...
Truckman Posted April 22, 2016 Report Share Posted April 22, 2016 Don't know about Rams but my Ford controller has to be set to either drum or disc brakes. Yes the Ram has setting for electric or electric over hydraulic, light or heavy, and gain. Quote Link to comment Share on other sites More sharing options...
Phil B Posted June 10, 2019 Report Share Posted June 10, 2019 Just found my problem with my brakes losing connection when turning to the right or when the road turns to the right. It was driving me nuts looking for this lost connection only when driving. Turns out it was near the drivers side rear tire of the fifth wheel camper. The brake wire was being pinched between a gray tank and the frame. So when I had water in the gray tank. It was heavier, the wire lost contact which showed up on my dash. Tank dry, there was no problem!! I hope this helps Quote Link to comment Share on other sites More sharing options...
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