Date:         Sun, 8 Oct 2006 18:57:55 -0400
Reply-To:     David Beierl <dbeierl@ATTGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         David Beierl <dbeierl@ATTGLOBAL.NET>
Subject:      Re: Missing a high-beam... suggestions?
Comments: To: John Runberg <jrunberg@mac.com>
In-Reply-To:  <10722365.1160348019458.JavaMail.jrunberg@mac.com>
Content-Type: text/plain; charset="us-ascii"; format=flowed

At 06:53 PM 10/8/2006 -0400, John Runberg wrote:
>Interesting, but here's the question:
>
>I'm getting 12v on the side that's not working - measured with the
>lamp disconneced. Connect the lamp and I get zero. Lamp is good -
>tested on the other side.

Leave everything hooked up.  Measure from the lamp to ground -- if
you get 12v then your problem is between the two voltmeter
probes.  If you get practically nothing, then the problem is between
the probe that's near the lamp, and the battery (and in practice, of
course, it has to be in that part of the circuit that's split from
left to right.

Whichever side it is, measure again from one end to the middle to
locate the fault one side or the other, and continue until you've
isolated it down to the specific connection or switch or whatever.

In an open-circuit fault like this, the voltage that should be
applied across the load will always appear at the fault location instead.

david


>john

--
David Beierl - Providence RI USA -- http://pws.prserv.net/synergy/Vanagon/
'84 Westy "Dutiful Passage," '85 GL "Poor Relation"