Originally Posted by Gone2long
Let me clarify. I used a "multimeter". I set it to read DC current
. When the red prob was connected to red wire, I got a positive voltage reading of over 10 volts. "Yes" not exactly accurate.
When I connected red prob to white wire I got no reading.
Thank you all for your invaluable assistance.
Does "Multimeter" mean DMM (digital multimeter) or analog multimeter? They're both multimeters. One (dmm) is far more common at this time. I can't remember last time I used an analog one, but I have. (I've been a stupid engineer
for something like 30 years.. hehehe but now I do software
with that aging EE degree...)
If you did have it set to current
(DC amps) and the wire you're looking at has battery
voltage on it, you've blown the fuse in the meter. No biggie, I've done that dozens of times. But since you didn't say the meter pegged then went to zero, I'm guessing you had it on DC volts
, which is what you want to measure - and "over 10" sounds like volts.
Reversing should move the meter to the left on an analog meter or show negative on a digital meter. If not, something (process, or the meter, or something) is off, and that's a red flag to those of us who deal with electrons very often, which is why you got lots more replies.
I concur with trace the wire. That's good advice. If you trace it and find a red on a breaker, and the white on a ground buss - you have a definitive answer.
Oh, and what overall are you trying to do? That may help get you better information to solve your issue. And may get advice to "just try it" (for something like a light fixture) to "that'll fry stuff" (for electronics)