Batteries going flat

Sep 16, 2010
2,736
2,364
Bungay Suffolk
Funster No
13,734
MH
C Class
Exp
Since 2010
engine battery went flat. Took iT off and tested iT, iT was OK after a charge. The red light on the dash stayed on flashing as normal. But are the two batteries connected permanent ? I turned Some habitation lights on and the engine battery showd a drop. Why should this be ?
Help please.
 

pappajohn

LIFE MEMBER
Aug 26, 2007
40,052
37,393
Dark side of the moon
Funster No
172
Exp
Since 2005
If you have a conventional split charge relay it MAY be the contacts have welded in the closed position.
I would expect the amperage, two to three hundred amps maybe, when cranking the engine would far exceed the current carrying capability of conventional split charge wiring though.
 
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