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Old 01-31-2017, 03:22 PM   #1
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Amperage from tow harness?

Another question came up today while looking into beginner RV things, specifically travel trailers - when you have the trailer hitched and wired to the tow vehicle, how much amperage is usually available to run systems on the trailer? Like can the slide and fridge be operated through power from the tow harness?
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Old 01-31-2017, 06:59 PM   #2
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The fridge doesn't operate on DC, and that is what's coming out of the tow vehicle to the trailer, but it does need DC to function.
The fridge will run on LP or AC.
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Old 01-31-2017, 07:06 PM   #3
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The fridge doesn't operate on DC, and that is what's coming out of the tow vehicle to the trailer.
The fridge will run on LP or AC.
That makes sense, but it's lie number one from the dealer. I figured the TT had an on board inverter or something. I'll have to keep a sharper eye on the dealer. What does run on DC from the TV?
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Old 01-31-2017, 07:19 PM   #4
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lloyd some of the new ones that Janet is looking at have residentual Refrigerators. They run off of an inverter no LP
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Old 01-31-2017, 07:19 PM   #5
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Some RV's do have an onboard inverter. If so equipped, it will operate the fridge if a residential fridge has been installed in it, but I don't know of any entry level models that has the inverter.
The tow vehicle will put a charge in the RV battery and operate the running lights.


What are you thinking of getting for your RV.
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Old 01-31-2017, 07:21 PM   #6
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lloyd some of the new ones that Janet is looking at have residentual Refrigerators. They run off of an inverter no LP

Knowing you and Janet, it's probably not an entry level rig. Or am I wrong on that to.
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Old 01-31-2017, 08:19 PM   #7
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I want a tear Drop that not going to happen
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Old 01-31-2017, 08:30 PM   #8
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Another question came up today while looking into beginner RV things, specifically travel trailers - when you have the trailer hitched and wired to the tow vehicle, how much amperage is usually available to run systems on the trailer? Like can the slide and fridge be operated through power from the tow harness?
The fuse for the auxiliary terminal in the vehicle's connection socket is usually in the under-hood fuse panel. It is normally 30 or 40 amps. On my Silverado it is 40 amps. The owner's manual for my Silverado also states:
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If charging a remote (non-vehicle) battery, press the Tow/Haul Mode button, if equipped, located at the end of the shift lever. This will boost the vehicle system voltage and properly charge the battery.
With a battery in the trailer, the main purpose of this connection is to keep the trailer's battery charged while the trailer's battery powers the 12v equipment in the trailer.
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Old 01-31-2017, 09:30 PM   #9
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What are you thinking of getting for your RV.
We're looking at a '17 Sunset Trail SS291RK this weekend.

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With a battery in the trailer, the main purpose of this connection is to keep the trailer's battery charged while the trailer's battery powers the 12v equipment in the trailer.
Is the motor for the slide DC? So pretty much just plug-in devices and appliances that need AC/generator power?
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Old 02-01-2017, 06:32 AM   #10
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We're looking at a '17 Sunset Trail SS291RK this weekend.



Is the motor for the slide DC? So pretty much just plug-in devices and appliances that need AC/generator power?
Slide will operate on DC. you are correct on the plug in devices.

I have to correct myself on the residential fridge not being installed in the entry level models.
Last fall when we were up north hunting I met a fella that had a small, but brand new camper with the residential fridge. I wondered why he bought it that way because he was dry camping for better then a month up there without electricity, and it didn't have an inverter. He spent more time running for ice then hunting.
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