Useing volt/ohm meter


Old 09-27-06, 06:12 PM
Thread Starter
Join Date: Sep 2006
Location: usa
Posts: 29
Useing volt/ohm meter

I need to know how to go about useing a volt meter to test a switch. Such as a key switch.
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Old 09-27-06, 06:18 PM
Join Date: Sep 2003
Location: Central New York State
Posts: 13,973
Measure the resistance across the switch. It should be infinite when the switch is open and zero when the switch is closed.
Old 09-27-06, 06:21 PM
Join Date: Apr 2006
Location: New Bern, NC
Posts: 1,623
Disconnect the switch from everything else.

Make sure that no voltage can be applied to it from any source.

Set the VOM to ohms.

Put one test lead on either side of the switch.

Measue the ohms when the switch is on or off.

OL means open load or switch off.

Any resistance value means the switch is closed.

this only applies to switches. dimmer and such work differently.
Old 09-28-06, 05:43 AM
Join Date: Jun 2006
Posts: 85
vom usage

If its the older type vom, i.e., non-digital readout, always adjust the ZERO control for zero on the meter with test prods shorted together.

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