Got through the resistance check with all the numbers checking out fine, and had just begun the voltage check and hit a few issues.
I got up through 14 and everything but two of the readings were incorrect. 6 & 10 which should read 0 were fluctuating quite a but from 0-40ish. Also probably a bit more serious, upon checking terminal 14 I got a loud pop and a few sparks. Obviously afraid that something was amiss I quickly turned it off and unplugged it. Checked the fuse, it was fine.
Not sure where I should go from here.