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                           Piper-List Digest Archive
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                     Total Messages Posted Sat 07/02/05: 1
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Today's Message Index:
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     1. 10:37 PM - Re: 1975 Warrior Amp meter  (JNice51355@aol.com)
 
 
 
________________________________  Message 1  _____________________________________


Time: 10:37:28 PM PST US
From: JNice51355@aol.com
Subject: Re: Piper-List: 1975 Warrior Amp meter

--> Piper-List message posted by: JNice51355@aol.com

In a message dated 6/8/05 6:37:58 AM Pacific Daylight Time, 
aplumley@icongrp.com writes:

> The amp meter needle does not give a steady indication, but rapidly moves 
> right and left.  It is very similar to feed-back from the strobe light, but is

> not in sync with the strobe.  We changed the regulator, thinking it was a 
> failed cut-out relay, but still has the same problem.  At times it will read

> normally, reflecting changing loads as you add or turn off things such as the

> landing light, collision / panel lights, or avionics.  At other times the 
> needle goes nuts.   I plan to isolate each circuit by tripping the breakers to

> see if I can narrow down the problem.  Could a diode in the alternator cause

> this?  I appreciate any help.
> 
> 

Al
Did you ever isolate this problem?  I've read material that leads me to 
believe that this problem is sometimes caused by one of two things.  One thing
to 
check is the field circuit breaker.  Excessive resistence with age accounts for

some of these problems.  Another source could be a bad overvoltage relay if 
you are so equipped.  This information was taken off of a troubleshooting page

from KellyAerospace.  Hope this helps.  I noticed that you referred to 
changing the "cutout relay" so that would not be your problem.  The troubleshooting

page did not mention an alternator diode as a possible problem.  At any rate, 
the cost of a field circuit breaker is nominal if it solves your problem.
Jim Nice