Guest Jim, like the look of that interior. Unfortunately the HD's follow 1 -2 years behind and until the chip MFG's move out of China (in process now) with supplemental production get back up to speed, various features are being "refunded".

BTW, the Chevrolet front grill is not appealing to me. Some love it, some hate it. I bought the Denali because of the front grill, not a fan of the GM no Denali grills that year.

Joseph,

I also did not care for the look but the High Country has grown on me. I'm not sure what Ford is doing but GM is installing all the hardware on many features and will at no charge install the module at a later date. The chip issue is bad, but in some cases there are advantages such as AFM and StopStart delete on the half ton models.
I'm looking forward to the diesel.

Jim

Welcome bac to FL. If you're getting in today, Monday, great day to open up, unpack. Expect rain tomorrow though.

Rob,

The adapter below from Curt worked when my neighbor had the same message on his Ford after changing his camper lights to LED's. If it works for you, may be the Curt plug would fit where your factory plug is currently located, I assume it's in the bed. I hope this helps.

https://www.amazon.com/CURT-57003-LE...ustomerReviews

Steve

Thanks Steve, This alternative would clear the lower connection for the trailer camera and TPMS.

Rob

Rob, I might be inclined to go with the wired in resistors. More plug connections = more opportunities for issues and chance to forget to use (or get stolen if left on the pigtail).

I dare say order from Amazon (potential quality questions) but https://www.amazon.com/Resistors-Sig...e%2C119&sr=1-2

Jlawles2
Hi Joseph,

LOL! That is exactly the resistor set that I just put in my Amazon cart. It is interesting that the individual resistors are packaged with heat dissipation fins and warnings that they get hot . . . but, no mention of this on the plug in adapters. I have the Mictuning junction box so connection should be easy. I was thinking to include a switch so that I can easily add/deduct this resistor. I am still not convinced that the error message is not being generated by something in the EoH brake apply. I have selected EoH & Medium Apply & 6.5 Gain . . . which makes the trailer braking "feel" right. My hesitation on blaming the brake light circuit is that an extended brake pedal apply when sitting stopped does not generate the error message. The light circuit should not know if the trailer is moving, but the brake apply does.

(Thanks for your help on this BTW)

Rob

Cate&Rob Rob you may need to call a few friends at the old job, but I think the trucks use a resistivity test with a PWM modulator to determine if there are brakes connected to the system. Basically I think it throws high frequency low voltage through the system to detect the brake magnets. You might get by with throwing a resistor on a NC relay into the circuit to simulate the magnets. (this is just a thought, less than 3 seconds into it though)

I have a 2022 F350 Lariat SRW Short bed on order with 20 inch wheels. I just snagged myself a 2018 GD 351M. I have a B&W 5th wheel hitch in the Ford OEM puck system. The trailer dry pin weight of 2800, but will lighten up as I load it (assuming I don't fill with water). My expected pin weight is going to be around 2600 lbs.

I'm curious if the 351M is going to be too high at the king pin where it hitches to the truck and put extra strain on the trailer rear axle. Does anyone have any experience with this type of setup? Am I going to need to flip the axles on the trailer to make it ride level?

Shnozzy

The connection between a Momentum and an F350 has not been reported to be a problem. I have seen several that are sitting level with 6 to 8 inches of clearance between trailer overhang and truck box. However . . . most consider a 351M to be well into "dually" territory. Your new truck will have a payload of about 3400 lbs. With the pin weight of the loaded trailer, the hitch and the people in the truck, you will quickly surpass this.

The axles cannot be "flippped" to gain trailer ride height . . . the axles are already under the springs.

Rob

Joseph,

The vehicle diagnostic side is not too sophisticated for a trailer connection. The GM vehicle looks at the voltage delivered and the return voltage on the trailer lighting circuit and will test this with a duty cycle that is fast enough that we typically do not see it. This does not apply to the GM trailer security system where the trailer lights can be seen to pulse to alert those that the security system is present. Pretty simple really. The issue occurs with LED trailer lighting where the LED light itself is controlled through PWM (why they flicker on video) where the LED is controlled with high intensity over a brief burst that is perceived as being brighter to the human eye over a continuous current. So the LED trailer lighting may need a resistor if the trailer lighting does not exhibit enough resistance for the TV to diagnose the circuit for a connection. This is aside from wet plugs, poor return wiring (ground) or bad connections at the 7 way or other circuits. Ford has had some issues with a wet 7 way plug in the location of the spare tire and may be worth a look.

There would be many ways to do this where this is how the GM truck operates. GM also diagnoses the brake circuit but does not use this for connectivity messages in general. I believe Ford does the same.

Jim

Guest Jim, thanks for the explanation. My guess in how the circuits determine if there is a trailer connected is just that a guess. Since most (not all) trailers use incandescent bulbs the truck electronics may not catch the connection or the circuitry in the LED bulbs may be having issues with the PWM signal that is used to determine if attached.

Cate&Rob Rob, have you tried it with the running lights on? This may help determine if it's a detection issue as the running lights may generate continuous voltage to the trailer circuit.

Don't Momentums getting lighter on the pin as you load it? Ya stick a SxS in the back and the pin weight goes down. No? Kinda like a teeter totter?

Hi Scott,

There would be some teeter totter unweighting of the pin with a vehicle in the garage . . . but, there is a lot of storage space forward of the trailer axles just like every other 5th wheel and the truck needs to be able to handle the trailer without anything in the garage. Momentums are usually pulled by duallies . . . there is probably a reason for that .

Rob

Thanks for the reply. Yes I've had to fight a battle between dually and not for a couple years. Based on my research of the 351m, if not fully loaded with water (which I don't intend to) I should have about 2600 pin weight after I'm fully loaded with my expected cargo. This should give me 900ish lbs for hitch and people. At this stage, as my kids combined weight less than 150 lbs, I'll be comfortably under. When they get bigger (10 years from now) that will be another argument with the wife that we'll be going dually I'm sure. Baby steps though, she'll come around eventually.

(My trailer has 2800 lbs pin weight per Grand Design VIN. I built my truck to be 3500 payload)