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Quick hint on finding an electrical short 700 1989

posted by  B.B. on  Sat Oct 25 02:05 CST 2008
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last visit: Mon Oct 6 13:15 CST 2014
[RELATED]

Hi Anderew,

You need to get a DC ammeter in series with a battery lead and
see how much current is flowing.

more than about 25 milliamps is trouble.

If you find for instance that you read 200 MA
then you remove fuses one at a time until the current flow drops to
about 25ma or so (Clock and CPU),
Then you have narrowed down where the problem is.
It is also possible that you have something unfused such as an alternater
or harness issue causing the fault. Deal with that after you try the fuses.

In a previous post you ignored my suggestion to measure the battery voltage
with the car off and running. You need to check these voltages to rule out something as simple as a loose alternator belt or a bad alternator.

Bill






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