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Rze 09-14-2007 11:13 PM

Testing DC
 
While I'm fairly proficient with AC, I've not had much experience with DC. I would have thought that testing a DC circuit was pretty much the same (one lead on Ground or Nuetral and one on the line in.) I tried to test (using a DC tester) a circuit for trailer lights on my car. When I plug it in, it works, so I know the circuit is good, however when I test it at the car, I don't get a result. Is there a trick to testing DC?

Dansbell 09-14-2007 11:54 PM

Quote:

Originally Posted by Rze (Post 63060)
When I plug it in, it works, so I know the circuit is good, however when I test it at the car, I don't get a result.

Can you explain your results a little more? How do you know the circuit is good? are you measuring Ohms (continuity)? I am not sure I understand how you are preforming the test? Testing DC voltage is really straight forward. Make sure your meter is set to the proper DC voltage (12v for your car) and place the positive (red) lead on the positive wire and the ground (black) lead on your ground.

Rze 09-15-2007 08:30 AM

Circuit is good since I plug in the trailer and the lights work...directionsls, lights, Hazrds and Brake. I did as you outlined as that makes the only sense. I must have a bad meter.

Clutchcargo 09-15-2007 09:02 AM

The fuse in the multitester is probably blown.


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