can anyone help, got fiat ducato 2.8 diesel lunar roadster 780 motorhome. when I go away for the weekend and have electric hook up it drains the engine battery, I get a jump start and it is fine, left parked up at home it starts fine 5 days later, but when I go away on the weekend and connect to electric hook up it drains battery again,any help greatly appreciated, many thanks, hoppo1
General flat battery
- Thread starter hoppo1
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General flat battery
Hi, welcome to Fiat Forum,
Assuming you have a "domestic" battery with split charge and hook-up charging there is a fault in the split charge system. However without knowing what the system is it's hard to know what is going on.
Do you know what make and model the split charge system is?
Robert G8RPI.
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When you are on EHU have you got the internal battery charger switched ON? If so is it charging both the habitation and cab batteries - doesn't sound like it. Are you sure that the habitation battery is OK. It could be draining the cab battery when they are paralled together It is hard to diagnose from here but it would be bread and butter to a decent auto electrician.
Split charge systems and systems with batteries connected in parallel and not in series need a diode to guard against the batteries becoming discharged if one is used more than the other. If you can isolate this component then Maplins may be the easiest place to source a replacement.
Some motorhomes have the choice to have the vehicle battery supplying the habitation area. It might be that your liesure battery is being charged but you are running off the vehicle’s battery which sounds like it isn't being charged. You need to understand your vehicle’s charging and control systems. What system do you have?
CDK
Member
There are several possibilities that can be discussed at length, but the shortest way out is to take a multimeter and check what happens when the vehicle is connected to the mains.