Troubleshooting with a Test Lamp
Troubleshooting with a Test Lamp |
Special Tools
EL-35616-200 Test Light - Probe KitFor equivalent regional tools, refer to Special Tools .
Refer to Test Probe Caution .
A test lamp can simply and quickly test a low impedance circuit for voltage. A Digital Multimeter (DMM) should be used instead of a test lamp in order to test for voltage in high impedance circuits. While a test lamp shows whether voltage is present if the impedance is low enough, a DMM indicates how much voltage is present. In other words, if there is not enough current, the test lamp will not illuminate even though voltage is present.
The EL-35616-200 kit is Micro-Pack compatible and comprised of a 12 V light bulb with an attached pair of leads.
To properly operate this tool use the following procedures.
When testing for voltage:
1. |
Attach one lead to ground.
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2. |
Touch the other lead to various points along the circuit where voltage should be present.
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3. |
When the bulb illuminates, there is voltage at the point being tested.
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When testing for ground:
1. |
Attach one lead to battery positive voltage.
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2. |
Touch the other lead to various points along the circuit where ground should be present.
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3. |
When the bulb illuminates, there is ground at the point being tested.
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