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Electric brake and taillight power source


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Getting ready to tow my Oliver to storage. I would like to take my batteries out at home beforehand. My question is “Do the electric brakes and taillights get their power from my truck or do they get them from the house batteries?”  

2021 LE I #819 / 2020 RAM 1500 Longhorn Hemi 5.7L 4x4

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Under "normal" circumstances, the trailer brakes and tail lights/directional signals are powered by the tow vehicle.

HOWEVER... in the case of a tow vehicle / trailer disconnect, the trailer battery is required to power the trailer brakes when the emergency disconnect cable/switch is engaged.

Without research, I suspect it is likely illegal in most states to pull a trailer with electric brakes and no on-board battery in case of a disconnect...

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Tom

2018 Oliver Legacy Elite #409 - 2017 Silverado 1500, 5.3L, 4x4 Z71, Dbl Cab, Std Bed

 

 

 

 

2022-10-26 Oliver Camped States (small).jpg

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7 minutes ago, ADKCamper said:

Under "normal" circumstances, the trailer brakes and tail lights/directional signals are powered by the tow vehicle.

HOWEVER... in the case of a tow vehicle / trailer disconnect, the trailer battery is required to power the trailer brakes when the emergency disconnect cable/switch is engaged.

Without research, I suspect it is likely illegal in most states to pull a trailer with electric brakes and no on-board battery in case of a disconnect...

This would be correct.

 

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Steve, Tali and the dogs: Reacher and Rocky plus our beloved Storm, Maggie and Lucy (all waiting at the Rainbow Bridge)

2008 Legacy Elite I - Outlaw Oliver, Hull #026 | 2014 Legacy Elite II - Outlaw Oliver, Hull #050 | 2022 Silverado High Country 3500HD SRW Diesel 4x4 

 

             801469912_StatesVisitedTaliandSteve08-23-2021-I.jpg.26814499292ab76ee55b889b69ad3ef0.jpg1226003278_StatesVisitedTaliandSteve08-23-2021-H.jpg.dc46129cb4967a7fd2531b16699e9e45.jpg

 

 

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If it should come uncoupled and wreck the trailer with no batteries in it, and injure some other party, you will be crucified in court, and your insurance would not cover you either.

OTH If you have a medium sized lawn mower 12 volt battery in good condition (and fully charged)  at home, you could install that in place of your big RV batteries. Even if it is a different type, it would work fine, just be sure to turn off all chargers if they are set for lithium batteries. You would need to rig some sort of adapter wires, your great big cables are too massive for the small terminals.

As always, check your emegrgency breakaway switch before departing.

https://www.amazon.com/Mighty-Max-Battery-ML5-12-Rechargeable/dp/B00K8UO288

It would be a whole lot simpler to just remove the main batteries at the storage lot and bring them back home.

John Davies

Spokane WA

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"Mouse":  2017 Legacy Elite II NARV (Not An RV) Two Beds, Hull Number 218, See my HOW TO threads: https://olivertraveltrailers.com/topic/john-e-davies-how-to-threads-and-tech-articles-links/

Tow Vehicle: 2013 Land Cruiser 200, 33" LT tires, airbags, Safari snorkel.

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