12 volts give or take, depending on the health of your charging system. You will place one lead on the wire you are looking for voltage at, usually sliding the probe into the back side of the harness while it is still plugged into the amp. The other lead is placed at a suitable ground. Any bare metal will work, or on the barrel of the cig lighter is another convenient spot. To check for a good ground, measure the amount of voltage from pin E11 to pin E8 and E11 to pin E9, as well as E12 to pin E8, And E12 to pin E9. Then compare the readings with the drop from positive battery terminal to ground. they should be within a volt of each other, unless for some reason the monsoon amp operates on less than 12v. Honestly though, if only the tweeters are working, and you remove one of the speakers and it tests good (test with another audio signal or a 9v battery), the amp is bad. |