diagnosing a mystery current drain

David Pertuz davidpertuz at mindspring.com
Sat Nov 22 23:07:42 CST 2008

Bad fuse indeed. Replaced it (wrong rating, but close, and it will still 
tell me what I need to know - relative draws) and found the drain in the 
dome lamp circuit, which also has the radio and something in the keyless 
entry system. Now I know what fuse to pull when I shut the car off, and 
I can track the fault down next week.


Jon wrote:
> Sounds like a cooked fuse in your meter. That is a big circuit to try 
> to measure with a 10A meter. If your meter is a pretty good one with a 
> mV scale, sometimes you can measure mV between the NEG battery post 
> and the bolt on the frame for the wire. If you see a few mV, try 
> turning some things on like the dome lamp to give yourself an idea of 
> mV/amp. Then you can start pulling fuses to see what is using current.
> Jon Davis
> David Pertuz wrote:
>> So....I hook my meter up in series with the ground terminal, and I 
>> get no current reading. Zero point zero zero. ?!??
>> I pull out various fuses (ignition off, key out) and check for 
>> current across the various fuse terminals, and I get no current. ?!?

More information about the se-r mailing list