I'm working on my friends 92 plymouth Voyager, and she complains that the battery keeps going dead. I put an ammeter at the battery, and found that a .25 amp current is present when the car is shut off, empty, and all lights are off, and doors are closed.
I trouble shoot, and found the pulling fuse f3, the interior light fuse, causes the current to drop to zero, so I know the problem is somewhere in the cab.
With the fuse in , and the I leak back, I pull both dome lights...still no change. Does anyone have a decent schematic on this electrical system? The Haynes Manual I bought doesn't show F3 as being the doom light.
BTW, when I first put the I meter in line the current starts out at about 1 amp or so, and drops off to a min of .24 a or so after just a few seconds (a incandesent bulb getting warm?)
Thanks
R Foy
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RFoy
There is a speaker in the engine compartment, that could be for an alarm, (but I disconnected all the leads to it) and there is a misterious small black box above the drivers legs under-the-dashboard. (havn't tried disconnecting the leads to it) The black box is a funny looking thing, smaller than a matchbox, with no markings or apprant use.
Does anyone know the 'common' amp/hr rating of a car battery? If it's 200 amp/hrs or so, a 1/4 amp should not really hurt it much. Could this leak be normal?
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RFoy
A car batteries reserve capacity in minutes, is tested at 20 amps current drain (champions anyway), so knowing the reserve capacity and the drain current you should be able to work out the ampere/hour rating of the battery.