I read this post with some degree of disbelief! for a moment, I thought
someone was "taking the michael" from an earlier post sent to the list on
August 20 (to save bandwidth, you can find it under "TR6 Charging Problems"
in the archives).
You have described exactly the dilemma I am experiencing, although mine
seems to afflict a 17ACR model (I have a 72 TR6). Every symptom you
describe, I have seen, and every bit of frustration, I've experienced!
Like you, I have checked the alternator, and it appears to be healthy, as
do the brushes. You have gone a lot further with your checks - I have
"sort of" relied on list responses, and although I didn't get any Triumph
list responses (because the problem is not a common one?), I did get some
helpful thoughts from a couple of 6-pack listers, but none solved the problem.
I know this doesn't help you one bit, but I do feel that it is a problem
that has been seen before. We've just got to hope that a person with the
solution sees the various posts before we go crazy.
Tony Gordon
72 TR6
(ps - since posting the problem to the list, I haven't had a reoccurrence
... weird, eh?)
>Date: Mon, 6 Sep 1999 00:29:05 EDT
>From: AKATR5@aol.com
>Subject: flickering AMP gauge needle on TR250
>
>
>Hi all...I am a list lurker but I have a problem with my TR250 that I can
not
>seem to figure out and I was hoping some of the list experts might be able
to
>help me. Below is a synopsis of the problem and what I have tried to fix
it.
> Any suggestions from the list on what I should try next would be most
>appreciated as I am at a loss as to what to try next.
>
>Thanks,
>Jan Dawson
>
>The System: 1968 Triumph TR250 with stock 15AC Lucas alternator with stock
>external Lucas 4TR voltage regulator mounted next to fuse box. Voltage
>measured at battery 14.3 at 2200 RPMs.
>
>The Symptoms: Needle on AMP gauge in dash flickers from side to side while
>the ignition/"no charge" light in speedo gauge flickers on and off.
>
> Engine RPM does not seem to affect condition.
>
> Turning on running lights, headlights or activating horns makes
condition
>go away (i.e. AMP gauge needle remains steady at neutral position and
>ignition/"no charge" light does not light up.
>
>What I have tried to eliminate problem:
>
> · Had my alternator tested at an alternator shop - tested ok
> · Performed diode check as described in Bentley Repair manual - tested
>ok
> · Checked brushes in alternator
> · Put in a "known" good alternator
> · Tried a new voltage regulator
> · Tried a different AMP gauge
> · Tried a new battery
> · Took apart voltage regulator and tested internal diodes and
resistors
>and checked out per wiring diagram - tested ok
> · Tested grounds to make sure all had good "clean" connections and no
>resistance
> · Tried adding a ground connection from alternator body to negative on
>battery
> · Checked continuity of wires from alternator to voltage regulator
> · Checked ground wire from alternator to engine block
> · Wired extra AMP gauge in series with existing gauge in dash, which
>only served to make the symptoms worse. Condition would not stop when
>headlights were turned on and it made the headlight flicker too.
>
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