Hi everyone,

I'm new on this group, but have seeked advise before by searching
through past topics.

I have a Challenger 40 sloop, and have a question on testing my
alternator and voltage regulator. I replaced both several months ago,
and now I'm not getting any output from my alternator. I have a
perkins 4107 diesel. When I hook up a voltage tester to the
alternator, with the engine running, I read the same voltage as the
battery, around 12.5. volts. When I hook up the tester to the
regulater, I do not read anything. Does this mean I have a bad voltage
regulator? Does anyone have a method of isolating if the issue is with
the regulator or the alternator?

I would appreciate any thoughts/ideas. This is a great group btw, with
a lot of experience and knowledge.