X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 1 [X] Return-Path: Sender: To: lml Date: Sat, 23 Dec 2006 12:50:46 -0500 Message-ID: X-Original-Return-Path: Received: from mx3.pshift.com ([216.57.116.8] verified) by logan.com (CommuniGate Pro SMTP 5.1.3) with ESMTP id 1704451 for lml@lancaironline.net; Sat, 23 Dec 2006 12:48:25 -0500 Received-SPF: none receiver=logan.com; client-ip=216.57.116.8; envelope-from=colyncase@earthlink.net Received: from ccaselt (unverified [216.57.118.129]) by mx3.pshift.com (Vircom SMTPRS 4.35.480.0) with SMTP id for ; Sat, 23 Dec 2006 12:47:37 -0500 Received-SPF: none (mx3.pshift.com: domain of colyncase@earthlink.net does not designate any permitted senders) X-Modus-BlackList: 216.57.118.129=OK;colyncase@earthlink.net=OK X-Modus-RBL: 216.57.118.129=Excluded X-Modus-Trusted: 216.57.118.129=NO X-Original-Message-ID: <004c01c726ba$6b85c590$7410020a@nvidia.com> From: "colyncase on earthlink" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Re: System level reliability X-Original-Date: Sat, 23 Dec 2006 09:47:30 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0049_01C72677.5D117F60" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3028 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 This is a multi-part message in MIME format. ------=_NextPart_000_0049_01C72677.5D117F60 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Mike said, I'm not sure how an alternator "shorts"=20 The alternator short could come from a worn winding on the armature. If you elect not to do anything about it, I think the best policy is to = pull all the breakers on the affected bus, close the affected battery contactor and add things back until you find = the problem or have enough up without a problem. Do all that before you turn on the crossfeed or you = may wipeout your only good power source too. Anecdote: I had a Nissan Stanza one year with fusible link protection in = the engine compartment. One very cold night I moved the car about 300 feet but when I turned it = off I heard some noise under the hood. I opened the hood and it was filled with black smoke. I = pulled all the breakers, no help. I dumped a large fire extinguisher worth into the engine compartment. = No help, something was still arcing. While I was in front of the car the starter started cranking = and almost pinned me to a snow=20 bankd. Then someone had the sense to rip one of the leads off the = battery. When it was all over I had burned a 3" hole through a metal fender and = wiped out the wiring harness=20 all the way to the trunk of the car. It was $2400 worth of damage (this = was 20 years ago) and Nissan never admitted any responsibility. To this day, I do not know what happened. but it does make me a fan of = being able to isolate every element of the circuit. Colyn ------=_NextPart_000_0049_01C72677.5D117F60 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Mike said,

I'm not sure how an alternator "shorts"

The alternator short could come from a worn winding on the = armature.

If you elect not to do anything about it, I think the best policy = is to=20 pull all the breakers on the affected bus,

close the affected battery contactor and add things back until you = find the=20 problem or have enough up

without a problem. Do all that before you turn on the = crossfeed=20 or you may wipeout your only good power

source too.

Anecdote: I had a Nissan Stanza one year with fusible link = protection in=20 the engine compartment.

One very cold night I moved the car about 300 feet but when I = turned it off=20 I heard some noise under

the hood. I opened the hood and it was filled with black=20 smoke. I pulled all the breakers, no help.

I dumped a large fire extinguisher worth into the engine = compartment. =20 No help, something was still

arcing. While I was in front of the car the starter = started=20 cranking and almost pinned me to a snow

bankd. Then someone had the sense to rip one of the = leads off=20 the battery.

When it was all over I had burned a 3" hole through a metal = fender=20 and wiped out the wiring harness

all the way to the trunk of the car. It was $2400 worth of = damage=20 (this was 20 years ago) and Nissan

never admitted any responsibility.

To this day, I do not know what happened. but it does = make me a=20 fan of being able to isolate every

element of the circuit.

Colyn

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