Testing for continuity/shorting
|
|
Testing for continuity/shorting
|
|
Testing for continuity (Resistance measurement)
|
|
1.
|
Make sure that the component
or cable to be checked is not live.
|
|
2.
|
With the instrument set to measure resistance, connect the test
leads to each end of the component or cable to be checked.
In the wiring, the resistance should normally be less
than 1 ohm. For components, the specified resistance should be obtained
as a reading.
|
|
Testing for continuity (Voltage measurement)
|
|
1.
|
Connect up the load, if any.
|
|
2.
|
With the instrument set to measure voltage, connect the black test
lead to a good ground and the red test lead to the wiring side
(positive).
|
|
3.
|
At the output of a control module or switch: take readings in the
direction away from the component and proceed successively out towards
the load. When the voltage reading drops to zero you have just passed
the break in continuity.
|
|
4.
|
At the input of a control module or load: take readings from the power
source and proceed successively in towards the control module or load.
When the voltage reading drops to zero you have just passed the break
in continuity.
|
|
Shorting to ground (Resistance measurement)
|
|
1.
|
Make sure that the cable to be
checked is not live and that the
load, if any, is disconnected.
|
|
2.
|
With the instrument set to measure resistance, connect one of the
test leads to the load side of the cable and the other test lead to a
good ground.
|
|
3.
|
Carefully move the wiring about while checking the instrument to see
whether it shows infinite resistance (OL) the whole time.
|
