An owner brought this up to me today and I thought I would pass it on to the masses.
The issue is with the DC-DC charger that uses the stock wiring from the tow vehicle thru the 7- wire connections.
What we have found is with the factory wiring in a fifth wheel , not sure about a TT.
From the factory the charge wire from the tow vehicle is connected to the emergency breakaway switch and also to the charge wire going to the bus bar inside the front storage and then to the battery to provide charge while towing. The problem is when the DC-DC is introduced into the system the charge wire from the 7 wire is removed from the bus bar and attached to the input of the DC-DC charger. WIth this being done and the DC-DC is wired so that it is only on when the owner switches it on or when the tow vehicle is attached there is no power to the emergency breakaway unless the tow vehicle is attached to the RV. If I understand the DC-DC correctly it will only pass power thru from the input side to the output side and not the reverse. In that manner if the 7 wire becomes unplugged from the tow vehicle there is no power to the emergency breakaway switch, which could happen in the emergency that it is designed for. So to remedy this issue we will need to run a new wire from the battery positive to the emergency breakaway switch so that there is always battery power there as it is intended.
I am open to other suggestions if there are any but I can not think of any other way to fix the problem.
Just a heads up to all of the owners that have done this modification. The emergency breakaway needs to function in the manner that it was designed for, safety counts.
Brian
The issue is with the DC-DC charger that uses the stock wiring from the tow vehicle thru the 7- wire connections.
What we have found is with the factory wiring in a fifth wheel , not sure about a TT.
From the factory the charge wire from the tow vehicle is connected to the emergency breakaway switch and also to the charge wire going to the bus bar inside the front storage and then to the battery to provide charge while towing. The problem is when the DC-DC is introduced into the system the charge wire from the 7 wire is removed from the bus bar and attached to the input of the DC-DC charger. WIth this being done and the DC-DC is wired so that it is only on when the owner switches it on or when the tow vehicle is attached there is no power to the emergency breakaway unless the tow vehicle is attached to the RV. If I understand the DC-DC correctly it will only pass power thru from the input side to the output side and not the reverse. In that manner if the 7 wire becomes unplugged from the tow vehicle there is no power to the emergency breakaway switch, which could happen in the emergency that it is designed for. So to remedy this issue we will need to run a new wire from the battery positive to the emergency breakaway switch so that there is always battery power there as it is intended.
I am open to other suggestions if there are any but I can not think of any other way to fix the problem.
Just a heads up to all of the owners that have done this modification. The emergency breakaway needs to function in the manner that it was designed for, safety counts.
Brian
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