multimeter help

if you had armed your alarm and the led was indeed blinking, you would have to set your multimeter on DC volts to measure it. If your alarm was disarmed and the led is not blinking the DC voltage setting would not work. If you wanted to test to see if your LED is actually lighting up or if you want to confirm its polarity, you should be looking at the resistance setting or if your multimeter has a diode test setting(look for a diode symbol) use that. It would usually give a reading if the polarity is correct and i've seen some multimeters which actually give the LED enough juice to dimly light up