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Old 07-09-2017, 09:24 AM   #15
Half a Rivet Short
 
2017 30' Classic
Carlisle , Pennsylvania
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Hi

Even if you do go with a fat wire to the connector, you still have the charge system in the truck doing it's thing. Read the various threads on how "essential" a super duper charger / converters and compare that to what your alternator is doing ....

Bob
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Old 07-09-2017, 01:44 PM   #16
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Quote:
Originally Posted by HiJoeSilver View Post
Redesigned in 2015 on. The old fuses and relays are gone. You won't read voltage on the charging post on the outlet of the 7 pin plug on the back of the truck. The trailer has to be connected to the truck and the truck has to be running. Then you have to tap the brakes so the truck can realize that your trailer is connected. When the truck realizes the truck is connected to the trailer (trailer connected message on dash) and the truck is running it will then send voltage to the trailer charging line. The stock wire on the new F 150s is only 18 gauge so it'll only give you enough to help keep the battery charged, not much else.

Hope this helps.
I have a 2015, Super-Crew, Eco-boost, and in my vehicle manual, there is no trailer power fuse listed. (Everything else is there.)

I haven't tried the above yet, (until i'm hooked up for the next trip), but I have no idea if there is a 30 amp fuse 'somewhere' for this function.
Anybody know where one might be???
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Old 07-09-2017, 05:24 PM   #17
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Thank you for all the feedback and suggestions. I had an opportunity to go out and try things today. Nothing worked.

With the trailer in use, I connected the 7-pin connector and powered up the truck. Checked voltage with a meter across the batteries..no change from without the connection. Did the same in Drive. No deal.

I am going to contact Ford to have them check out the circuit.

Joe
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Old 07-10-2017, 10:28 AM   #18
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Originally Posted by JoeHTP View Post
Thank you for all the feedback and suggestions. I had an opportunity to go out and try things today. Nothing worked.

With the trailer in use, I connected the 7-pin connector and powered up the truck. Checked voltage with a meter across the batteries..no change from without the connection. Did the same in Drive. No deal.

I am going to contact Ford to have them check out the circuit.

Joe
Hi

Have you gone through the entire "set up the trailer" process on the screen in the cab? Does the truck recognize the trailer (report it on the screen) when you hook it up? That's what has to happen in order to get power to the 7 pin.

Bob
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Old 07-13-2017, 12:12 PM   #19
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Yes, the trailer is set up and recognized. Had a chat with Ford and they are going to have a look when I bring it by.

Joe
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Old 07-24-2017, 02:09 PM   #20
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I think I figured out what may have happened. When I picked up my AS, the batteries were not fully charged (due to another problem - I think the batteries need to be above a certain voltage. As suggested,the brake has to be tapped and the vehicle has had to be in drive for the power to kick on. If I do that, my battery meter shows 13.4 volts.

However, due to the problem with the charging before I picked it up, I do not think the batteries are fully up to speed.

Joe

Quote:
Originally Posted by JoeHTP View Post
Yes, the trailer is set up and recognized. Had a chat with Ford and they are going to have a look when I bring it by.



Joe
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Old 07-25-2017, 11:37 AM   #21
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South of the river , Minnesota
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Joe,

I have a 2017 F-250 now.

You are correct, you will not get 12v to the trailer until you start the truck and go through the motions of driving, and the truck electronics have to recognize the presence of a battery.

I ran into this when I had left something on in the trailer while in storage, and was trying to get the fridge going.
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Old 08-27-2017, 06:39 PM   #22
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Process for getting newer Ford F-150s to recognize trailer & start charging batteries

You have to go through a short process to get the newer Ford F-150 trucks to "recognize" the trailer so it will start charging the travel trailer's batteries. It is not plug and play. No rewiring, work-around or new fuses, required, just a couple of steps that Ford built in. Here is a short video illustrating how to do it:
https://youtu.be/8aX6HrPUnB8
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