Tcash
Samba Member
Joined: July 20, 2011
Posts: 12846
Location: San Jose, California, USA
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 Posted: Fri Mar 20, 2015 11:50 am Post subject: Ignition switch testing , voltage drop test |
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| [url=http://www.thesamba.com/vw/forum/viewtopic.php?p=7601122#7601122]Ignition switch testing , voltage drop test[/url] |
Voltage drop testing ignition switch.
Test #1
Ignition on, position:
(Red) test lead to terminal 30, (Black) test lead to terminal 15
= Less than >0.5 volt switch is good
= Between 0.5v-1v is marginal
= More than <1 volt switch is bad
Test #2
Starting, position:
(Red) test lead to terminal 30, (Black) test lead to terminal 50
= Less than >0.5 volt switch is good
= Between 0.5v-1v is marginal
= More than <1 volt switch is bad
A Voltage Drop, test the components under load.
An ohm meter generally uses a 9v battery to power the circuit. Which puts out about 18 mA across the component being tested. Which is not enough Amps (current) to cause problems in many cases.
Hope it helps
Tcash
Here is a good article.
Electrical Automotive Troubleshooting |
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