TM 10-3510-208-34
not touch ground has metal to metal contact with
ground. To check for shorts, do the following steps:
(a)
Set up and "zero" the multimeter
(fig. 2-20).
CAUTION
Failure to do the following step can
damage the multimeter.
(b)
Disconnect the circuit being tested.
To be safe, disconnect the battery ground strap.
(c)
With all three multimeters, connect
one probe to one circuit and the other probe to the other
circuit or ground (if checking for a short to ground). The
example (fig. 2-4) shows a check to see if wire "A" is
shorted to wire "B" in the wiring harness.
Figure 2-4. Testing for shorts.
(d)
Look at the needle.
1. If the needle swings to the far
right over the "0" on the top scale (on all three
multimeters), the circuits are shorted.
2. If the needle doesn't move, the
circuits are not shorted.
3. If the needle jumps or flickers,
the circuis are occasionally shorted.
(4)
Testing
Resistance.
To
measure
resistance in a circuit, do the following steps:
(a)
Set up and "zero" the multimeter
(fig. 2-2).
CAUTION
Failure to do the following step can
damage the multimeter.
(b)
Disconnect the circuit being tested.
To be safe, disconnect the battery ground strap.
(c)
If the test in this manual calls for an
"ohms range" different than "RX1" or "X1", set the
selector switch to that range (such as "RX10" or "X10").
NOTE
"Zero" the meter whenever you
change ranges.
(d)
With all three multimeters, connect
the probes across the circuit or item to be measured.
The example (fig. 2-5) shows measuring the resistance
of a temperature sending unit.
2-9
