[V8] multimeter interpretation

[d saad]

These are odd results. First off, I think you would be fine with a reading
anywhere within 10% of 1K - so 900 to 1100 should be OK. In fact, 20%
would probably work, so your readings are good - but the odd part is the
plastic cover. It appears to be adding a parallel resistance, and that
could be a big problem. When making resistance measurements, you have to
be careful not to let your body become part of the circuit. At least one
lead of the meter has to NOT TOUCH your body or anything else conductive
or you can add a parallel resistance path. I would double check your test
setup, and make sure the plastic cover is very clean.

Dave


> When I replaced the ignition reference and engine speed
sensors on our V8
> #1, solving the hot start problem, both the
ones I took out were caked
> with dried-on oil and grime.  Cleaned
them up and the look almost like
> new, so I decided to put them
to the "test" in the service manual.
> 
>   With
my multimeter set on 2K ohms, it reads "1.000", and when I
connect
> to the terminals as described in the test procedures, I
get .975 on the
> screen for the speed sender.  That's with the
protective plastic sleeve
> on the sensor that came on the new
ones I installed.  If I remove that
> sleeve, I get 1.003.
> 
>   On the one that was installed in the ignition
reference sender location,
> that's the one that creates the hot
start problems, I get .992 readings
> with or without the
sleeve.
> 
>   On a brand new sensor for a 5ktq that I
bought because it's 2/3 the cost
> of the V8 version, I get
1.033.
> 
>   The test calls for "approximately 1K
ohms" for a good sensor.
> 
>   Is .992
"bad"?  I presume the grime had the effect the sleeve does on
> the speed sender.
>
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