2017 New truck says 5th wheel it not connect? Update 8-4-18

Question

I have a new 2017 Ford 350 dully connected to a 2010 Dream Suite 5th wheel. When I start to pull out of my yard the truck dash reads out that the trailer is disconnected. Also when I turn the left and right turn signal on when driving the truck reads out that the signals are failed and the truck dash right or left signal flashes rapidly. I have hooked up to different trailers, have the ford dealer check the stocks, changed out the trailer 7 pin connector. I have hooked up to different trailers, have the ford dealer check the stocks, changed out the trailer 7 pin connector and check to connection on the trailer and truck to the best of my ability. Only when I connector to my DRV 5th wheel I am having a disconnected trailer reading. I am an electrician. Most RV shop that I am having a bad ground issue. Any advice please. Do I need to better ground hydrastar unit? I do have a Hydrastar electric over hydraulic actuator and disc brakes. The trailer lights are working properly and when I step on the brake the brakes do operate/ work.

I am just try to see if I over looked something before I pay a RV shop to check out the trailer and or take the truck back to the Ford dealer for the forth time.

f-troup · Answer

My son's GMC Dinalli showed the same message, it was a loose ground wire in his 5th wheel cord.

agesilaus · Answer

F-TROUP wrote:My son's GMC Dinalli showed the same message, it was a loose ground wire in his 5th wheel cord.Ditto I had to replace the plug on mine, not hard to do.

terryallan · Answer

Chuck .. wrote:I have a new 2017 Ford 350 dully connected to a 2010 Dream Suite 5th wheel.   When I start to pull out of my yard the truck dash reads out that the trailer is disconnected.  Also when I turn the left and right turn signal on when driving the truck reads out that the signals are failed and the truck dash right or left signal flashes rapidly.   I have hooked up to different trailers, have the ford dealer check the stocks, changed out the trailer 7 pin connector.  I have hooked up to different trailers, have the ford dealer check the stocks, changed out the trailer 7 pin connector and check to connection on the trailer and truck to the best of my  ability.  Only when I connector to my DRV 5th wheel I am having a disconnected trailer reading.   I am an electrician.    Most RV shop that I am having a bad ground issue.  Any advice please.  Do I need to better ground hydrastar unit?  I do have a Hydrastar  electric over hydraulic actuator and disc brakes. The trailer lights are working properly and when I step on the brake the brakes do operate/ work.I am just try to see if I over looked something before I pay a RV shop to check out the trailer and or take the truck back to the Ford dealer for the forth time.Do you have the brake controler set to electric over hydraulic?. I found that setting by accident.

maintcpo · Answer

might try some dialectric grease I had the same issue with my gmc and this solved the issue

fulltimer50 · Answer

If the Ford works fine with other trailers, it would not be high on my list to be the problem. A 2010 is few years old. I would check the umbilical cord and its connections on the trailer. A wire could have gone bad inside the cord or a connection to the trailer bad giving intermittent operation.

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2017 New truck says 5th wheel it not connect? Update 8-4-18

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