CA Traveler wrote:
A potentially huge draw would be EPS which apparently the OP has since he mentioned wobble. Has anyone measured the amps used when towing especially with EPS running?.
Why would electric power steering be operating ?
EPS
can draw a large current, but that would be is slow "parking" type maneuvers. The reason why manufacturers a switching to EPS over hydraulic power steering is that they do not take as much power from the engine.
A hydraulic PS pump is running all of the time at maximum volume just pumping the fluid around in a circle. It needs to operate this way so that it is always ready to assist you. EPS standby current is tiny and the battery is there to handle the short, high current demands.
Use a
DC-DC battery charger between the tow vehicle and the towed vehilce.