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Old 01-24-2011, 11:08 PM
frosty frosty is offline
TT Regular
Join Date: Oct 2004
Boat: 1998 Maristar 225 LT-1 (the SS Overkill)
Posts: 97
Thanks for the replies, guys.

So, if I get this correctly, I can either purchase the CodeMate code reader for $39 (, and read the LED flashes to get the MEFI error code (but not know the exact component that triggered the code),
or spring for the USB -> MEFI cable for $195 ( and use the free software ( to read the error codes, and much more.

Am I missing anything?

It doesn't look possible to build your own MEFI cable, must be some circuitry involved.

Thanks for the education!
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