ProMariner Battery Isolator - Manual (Page 2)

Frequently Asked Questions:
1) QUESTION: What is an isolator used for?
ANSWER: They are solid state devices which allow electrical current to flow in one directly only. This allows one or
two alternators to be connected to multiple battery banks without fear of fully charged batteries discharging into
undercharged batteries.
2) QUESTION: How do I know which isolator I need?
ANSWER: It all depends on the number of alternators you have, the amperage output of the alternator(s), and the
number of batteries that you are wiring to. Note: Professional Mariner Isolators are not recommended for use with
any self energizing style alternator.
3) QUESTION: How do I wire up the isolator?
ANSWER: The isolator is wired between the alternator and the batteries. One or two alternator input terminals
connect from the alternators to either two or three output terminals connected to batteries.
4) QUESTION: There is no output voltage on my isolator?
ANSWER: Check to see if the isolator is working with a digital multi-meter set on “DIODE CHECK” mode. Put the
red lead on the alternator input terminal and the black lead on one of the battery output terminals…..you should get
a reading around .4 on most meters. Then reverse the leads and you should get a reading of infinity. Perform this
procedure from all of your alternator input terminals to all of your battery output terminals. If you get a different
reading with the red lead on a battery terminal then the isolator is defective.
We are committed to customer satisfaction and value your business. If at any time you experience a
problem with your new ProMariner battery Isolator, simply visit
www.promariner.com or call us at
1-800-824-0524 for technical support.