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I have a new Klein MM100 multimeter I changed the 9 volt battery & tried to turn it on and now it will not come on at all is there another hidden battery I don't know about or fuse to get it working again also will a Klein dealer swap it out being defective or should I just trash it.

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SOURCE: 12 volt Power outlet in Chrysler Mini Van does not work

im sure of a fuse somewere and its probably a large one.
if the unit shorts it has to have a fuse first thing.
you may find a fuse under the hood in the fuse box.
and then you may find a fuse in the unit itself .
the other thing is to remove it and connect it to another car battery.
if you have a bad unit then a salvage yard in your area should have one.
also test the power in your car going to the unit.if its set to run all the time then theres a fuse at the battery or the fuse box.
one other thing is check for recalls
you may get lucky.

hope this helps

Posted on Jul 29, 2009

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Do you have a multimeter? If so,
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the fuse is ok as you have a reading on the gauge
the problem is in the alternator or regulator or battery
charge lights work from a positive and a negative current flow
when you turn the key on the current flows in one direction through the light to the alternator and so it lights up
when the engine is running the alternator is charging ( normally at a higher voltage than the battery and so a current is directed back through the light to the battery
these two opposing currents mean that there is no current flow through the light and so it goes out
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1st check your battery with a multimeter (go digital if you can) theses are very cheap to buy, and you will use it a lot, set it to volts DC as per instructions start car and connect multimeter probes or clips to appropriate battery termianals, read display it shoud be 13.8 volts,, you now know battery cables and alternator are fine,, disconnect battery and do the same with multimeter on the battery again, leave sitting and watch reading if it goes below 12 volts over an hour your battery needs replacing.. If all good check when the battery terminals are back on tight and clean put the multimeter probes on termianls and ignition off and watch to see if reading starts to drop, if nothing turn ignition to accessories with everything turned off and again watch meter,, its a long process If you find it is still draining then pull a fuse at a time and check meter each time, if still dropping put the fuse back in and pull another one out.... repeat process till found........ before you start check glove box light isnt staying on, boot/trunk light is going off, ( put someone in there if you cant see) ,, If you have put in an aftermarket stero it may draw to much and you may have to upgrade your system, start with checking your battery

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