amp /volt question

[Drew]

On Fri, 2004-05-21 at 12:19, no1of consequence wrote:
> you know youre getting rusty when..
> 
> in order to deterimine if there is any draw off the batt when the car is 
> off, put the meter between the neg battt post and the neg batt cable [cable 
> obviously off disconnected] and measure for AMPS, right? and hope for as 
> close to none as possible.. i measured 9volts dc and thought OH MY GOD IT"S 
> DRAWING 9 VOLTS?!?!?!? and then i thought.. 'that cant be right'. =)
> 


Yes, you want to have your multimeter connected to measure current, on
the amp scale.  Most multimeters only measure up to 1000 milliamps (1
amp) via the internal fused circuit.  Others have an extra connection
for a 10amp unfused test circuit.  Really good ones come with a shunt so
you can measure serious amperage... :)

You should be looking at in the neighbourhood of 100-300 milliamps with
for radio/clock etc.  Make sure your doors are all closed so the
interior lights are out.

Drew


> thanks all,
> jim
> 
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