gmcjetpilot(at)yahoo.com
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 Posted: Tue Jun 20, 2006 8:02 am Post subject: Alternator sense wire (still not wired correctly) |
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Dale:
Your alternator is still not wired correctly. I am not sure
how you have your alternator wired or what alternator you
have, BUT if it has a sense wire it should be wired direct
to the POS side of the battery, direct, not to the output
of the alternator. The common short cut but wrong.
Wire goes from POS battery terminal with a 1 to 5 amp
in-line fuse w/ a dedicated wire (about 18 gage) to the sense
terminal on the alternator. This is the way it was designed
for the application it was originally intended, a car. You may
see another 0.1-0.3 volt increase in voltage and further stability.
Who ever told you to JUMP the sense wire direct to the
output or B-lead (battery lead) is cheating. It works but
is NOT the proper way to do it. If they wanted you to just
jump the sense wire they would have just jumped it internally
and forgot the sense wire all together. Trust ME. Follow
the recommend wiring per the alternator and the original
application.
I also recommend if you have a warning light you wire
that in as well. Write me with the model number of the
alternator and I see if I can get you a proper wire diagram.
Here are generic wiring diagrams.
http://www.autoshop101.com/forms/h8.pdf
This is a pfd file. The diagram on the first page shows
the proper wiring. The single wavy line is a fuse and the
dual wavy line is a fusible link. Write me if you have
questions. THERE is a REASON to wire it thus way.
Don't BE smarter than the engineers that designed
the system.
Cheers George
| Quote: | From: "Dale Walter" <dale1rv6(at)comcast.net>
Good morning,
I read about this (connecting a wire from sense pin to
output post) recently and-knew mine was not there.
>My voltage had usually been between 13 and 14 volts
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| Quote: | but occasionally dropped to 12.2 or up to 15.9. So
Saturday I connected the sense wire. On the first 3
>flights short flights the voltage has been much more
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| Quote: | stable; 13.0 to 14.1. Never saw more than 14.1.
I plugged a $15 battery monitor from Walmart to my
>cig lighter to back up the reading from my Grand Rapids
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| Quote: | EIS voltmeter. Alternator is the common one from a
Japanese vehicle. Thanks to those who brought up this
>issue recently. My question is; can anyone explain
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| Quote: | why the voltage did not run up much higher before I
had a sense wire connected?
Thanks, Dale Walter RV6a 618 hrs
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