ohms test
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ohms test

 
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jdl



Joined: 10 Dec 2006
Posts: 5
Posted: Sun Dec 10, 2006 9:07 pm    Post subject: ohms test Reply with quote
Automotive pcm, injector driver circuit. If the transistor or switch for that circuit is turned off, is there still continuity, between the pcm pin and pcm case?
Is it safe to do an ohms test, on that circuit?

I just wanted to add, that is a ground circuit, when the switch is closed. thanks

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neon



Joined: 25 Feb 2006
Posts: 590
Posted: Mon Dec 11, 2006 5:25 pm    Post subject: Reply with quote
usualy on a car the negative lead is tied to the engine block. YES it is safe to use an ohmeter provided that first you test with the voltmeter that there are no voltages present. then use the voltohmmeter. if you try to measure an active 12v with the meter and there is 12 v say goodby to the meter.
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