|
Yes, you are doing it wrong, lol. 20k is a reading of resistance (up to 20k ohms, specifically), which means that no other voltage can be flowing in the circuit (ie test subwoofer coils, wires for continuity, etc). If you ever test for resistance and get a negative number, that means there's power in the circuit somewhere.
To measure a car battery set it to the black 20 (that's 20v DC), and then test between the + post and ground (- post or chassis). The numbers may read 12.6 or -12.6, depending on if you're touching the positive lead to the positive post, or vice versa, just something to remember.
The red numbers are for VAC, of course.
The little sonic looking thing is the tone setting.. basically it'll emit a tone if you measure a wire and it had continuity.. useful for fiding broken wires/ bad ocnnectors/etc.
__________________
|