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10-11-2017, 01:38 AM
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#1
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Junior Member
Join Date: Sep 2017
Posts: 17
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2017 F350 Trailer Tow Fuse
Question Here....I am trying to get 12V to the onboard batteries to keep them charged while on the road. Problem Here....The relay slot on the truck has no spades to make contact, and the fuse slot seems to have only 1-spade (2 needed to complete the circuit) Anyone had a similar issue??? Got me baffled and the Ford dealer just sent an inquire to Ford to see what they have to say about it. Thanks for any response!
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10-12-2017, 07:27 PM
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#2
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Senior Member
Join Date: Feb 2013
Posts: 1,855
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Sorry...I don't understand. Your trailer plug should be providing 12V to the RW.
__________________
2012 F350 KR CC DRW w/ some stuff
2013 36FL
Cindy and Tom, Toby and Kasey (our Berner and Newfie)
Oh...I forgot the five kids.
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10-12-2017, 08:15 PM
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#3
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Senior Member
Join Date: Jul 2013
Posts: 721
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It's possible your truck is not equipped with a tow package? As Tom said, if it is you should have a 4 pin trailer connector (flat) and a 7 pin connector (round). The 7 pin has a pin for house battery charging. If you don't have the tow package on your truck, maybe the fuse box is not equipped with a trailer charge line.
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Jim & Mary 2013 36 RL with Titan Disc Brakes Residential Fridge Goodyear 17.5 H rated tires MORryde IS, MORryde pin box 2015 Ford F350 King Ranch DRW
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10-12-2017, 10:57 PM
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#4
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Senior Member
Join Date: Oct 2015
Posts: 500
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Some vehicles actually just come with a pigtail that terminates near the fuse box and you need to connect it to get power to the trailer plug I am not sure why the manufactures do that but I can think of several vehicles that are in that category .
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10-13-2017, 04:29 PM
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#5
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Senior Member
Join Date: Feb 2013
Posts: 1,855
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Quote:
Originally Posted by xtasee
Some vehicles actually just come with a pigtail that terminates near the fuse box and you need to connect it to get power to the trailer plug I am not sure why the manufactures do that but I can think of several vehicles that are in that category .
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I've seen that for aux. switches but never for the trailer plug.
And to J&Ms point, if that kind of truck was sold without a trailer package, and the customer didn't know it, the salesperson should be drawn and quartered.
__________________
2012 F350 KR CC DRW w/ some stuff
2013 36FL
Cindy and Tom, Toby and Kasey (our Berner and Newfie)
Oh...I forgot the five kids.
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10-13-2017, 10:06 PM
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#6
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Junior Member
Join Date: Sep 2017
Posts: 17
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The fuse box has spots for what ford calls “Trailer tow battery charge” which is exactly what I need. The Ford response to my dealer is that there is no fuse for that spot and none intended!! The dealer says every Super Duty truck which is what mine is should be equipped with them. They are wanting me to bring the truck and trailer both to the dealership and they say they will have to do diagnostics to change stuff on the truck computer system to get it to do that....Very strange! I’m NOT going to do that. I am thinking, the truck has an onboard inverter that makes 110 power and if I could just figure how to run a power cord to the truck I could just get a battery charger to put on the batteries? What do you guys think?
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10-13-2017, 11:25 PM
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#7
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Senior Member
Join Date: Nov 2014
Posts: 2,032
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If it were me being a new truck I would take it to the dealer and tell them to fix it
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2015 36RL pushing a 2015 Denali
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10-14-2017, 12:06 AM
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#8
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Senior Member
Join Date: Oct 2012
Posts: 412
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I agree Shane-returning the truck to the dealer to have a properly installed tow package would be best. Vehicle insurance companies also like that in case of an accident or fire.
__________________
Bob and Carol - Lees Summit, MO,
2016 Silverado 3500 HD, High Country DRW diesel, 3.73 gear ratio, long bed, 25K Reese Elite removable hitch with 2013 Redwood 36RL with 17.5" H-rated tires and MOR/ryde heavy duty shackle links and bushings; 6.5 KW gen
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10-14-2017, 12:07 AM
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#9
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Senior Member
Join Date: Feb 2013
Posts: 1,855
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So...you're wanting to use 120v from the truck's inverter to charge the house batteries in your RW?
The plot thickens.
__________________
2012 F350 KR CC DRW w/ some stuff
2013 36FL
Cindy and Tom, Toby and Kasey (our Berner and Newfie)
Oh...I forgot the five kids.
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10-14-2017, 01:29 AM
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#10
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Senior Member
Join Date: Jul 2013
Posts: 721
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Well my on board inverter plugs on my 2015 F350 say 150 W, which translates to about 1.25 A AC, which is not nearly enough to run any 12 VDC battery charger I'm familiar with.
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Jim & Mary 2013 36 RL with Titan Disc Brakes Residential Fridge Goodyear 17.5 H rated tires MORryde IS, MORryde pin box 2015 Ford F350 King Ranch DRW
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10-14-2017, 03:00 AM
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#11
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Senior Member
Join Date: Jan 2012
Posts: 2,811
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I'm not even sure that would be enough to power a Battery Tender Junior.
I agree, make the Truck right, or at least have them run a fused line from the battery back to the 7 pin connector for +12 V power.
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Michelle & Ann
2018 Chevy 3500HD Crew Cab High Country DRW, D/A, 2016 RW39MB, Dual ACs, Auto Level, Auto Sat Dish, Stack W/D, King Sleep #, 17.5" Sailuns w/Disc, MORryde IS & Pin, Comfort Ride Hitch, 5.5 Onan, Res Fridge & Induction Cook Top
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10-14-2017, 05:04 PM
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#12
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Senior Member
Join Date: Oct 2015
Posts: 500
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Here is probably a stupid question. Have you checked to make sure the wiring in the Redwood is correct? I had a huge issue with the 12 V wiring from the factory being hooked up incorrectly and my brakes did not work right. I chased the problem with the truck for quite a while before I realized the people at Redwood installed it wrong from the get-go. I found my problem in the junction box at the pin box .
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Larry, Stephanie Park City, Utah
2017 31SL King, 8K axles, Disc Brakes,17.5 Goodyear H tires,BU Camera,5.5 Onan, Heated HT pads, Two Uniguard Awnings, Slide Toppers, 2000w PSW inverter
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10-17-2017, 04:29 PM
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#13
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Senior Member
Join Date: Oct 2015
Posts: 500
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Ron,
Did you ever get the issue figured out? It would be nice to know the outcome.
__________________
Larry, Stephanie Park City, Utah
2017 31SL King, 8K axles, Disc Brakes,17.5 Goodyear H tires,BU Camera,5.5 Onan, Heated HT pads, Two Uniguard Awnings, Slide Toppers, 2000w PSW inverter
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10-17-2017, 05:08 PM
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#14
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Junior Member
Join Date: Sep 2017
Posts: 17
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Still working on it....been gone for a few days and just now getting back. Will post the resolution when I get to the bottom of it!! Thanks....
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10-20-2017, 12:26 AM
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#15
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Junior Member
Join Date: Sep 2017
Posts: 17
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Finally got to the bottom of the issue....dealer got response from ford. The 2017 super duties with a brake controller no longer need the fuses!! When a trailer is plugged in and the brake applied that activates a trailer module (trm) that sends power to operate the trailer charging. Who knew.... Evidently not the dealer!!!! Lol
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10-20-2017, 12:47 AM
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#16
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Senior Member
Join Date: Jul 2013
Posts: 721
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I hope you're not saying the only time the charge is applied to the coach batteries is when you are stepping on the brake? Or just the first time you do.
__________________
Jim & Mary 2013 36 RL with Titan Disc Brakes Residential Fridge Goodyear 17.5 H rated tires MORryde IS, MORryde pin box 2015 Ford F350 King Ranch DRW
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10-20-2017, 01:11 AM
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#17
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Junior Member
Join Date: Sep 2017
Posts: 17
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No...just the first time to activate it I guess.
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10-20-2017, 01:16 AM
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#18
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Senior Member
Join Date: Feb 2013
Posts: 7,101
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That would make sense. I towed either the boat or Redwood behind my 2014 Ford, and it knew which one I had plugged in somehow.
__________________
Brad & Dory - Lone Tree, CO
CURRENT - 2013 Itasca Meridian 42E/2013 Wrangler 4dr Sahara
SOLD - 2014 Redwood 36RL/2014 F350 DRW
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10-20-2017, 01:24 AM
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#19
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Senior Member
Join Date: Oct 2015
Posts: 500
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I will assume Ford is now like GM. GM sends a very small current down the trailer wiring and knows when a trailer is connected.
My 2017 GM is different than the 2010 GM we had before. The trailer wiring being wrong from Redwood did not surface until I bought the new truck. I spent several hours trying to run down the problem with the new truck before we discovered the problem was in the Redwood.....
I am not surprised that the Tech-support people at Ford had to let the dealer know of the change. They had to run into the issue before they were educated on the small change.
I am glad to know your truck is working fine.
Just curious what led you to think you were not charging the trailer?
__________________
Larry, Stephanie Park City, Utah
2017 31SL King, 8K axles, Disc Brakes,17.5 Goodyear H tires,BU Camera,5.5 Onan, Heated HT pads, Two Uniguard Awnings, Slide Toppers, 2000w PSW inverter
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10-20-2017, 01:34 AM
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#20
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Junior Member
Join Date: Sep 2017
Posts: 17
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I noticed the refrigerator was a not on when hooked to the truck, which ended up just being the outlet at the inverter was tripped somehow? reset that and that took care of that.
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