[6pack] Fwd: Alternator warning on, ignition off

[John North]

I had a local alternator shop repair it.   They replaced the rectifier and
regulator.  We talked about how this happened (again) and he talked about
having a flat battery and then jump starting and expecting the alternator
to recharge the battery.   Apparently this puts way too much stress on the
alternator leading to premature failure.   I don't exactly recall doing
that recently, but I am probably guilty.   I am so used to automatic turn
off of lights and other modern conveniences...

John North

On Fri, May 4, 2018 at 5:15 PM, Robert Lang <robertlangtr6 at yahoo.com> wrote:

> Hi John,
>
> Sounds like an alternator diode has failed - a competent alternator shop
> can replace the diodes and it is possible to do the job yourself if you
> have a fairly powerful soldering iron. But a shop will clean everything and
> make it look brand new.
>
> The warning light indicates current is flowing through the circuit and
> with the ignition off there should be no current flow there.
>
> Good luck!
>
> Bob Lang
>
>
> On Friday, May 4, 2018, 12:55:09 PM EDT, John North <johncnorth at gmail.com>
> wrote:
>
>
> Thanks for the help Bob.   I do have the correct lamp connected.   I am
> unable to pull off just the N/Y wire from the alternator, because both
> Brown wires and the Brown/Yellow wire are on a single plug that pushes into
> the alternator.   If I remove this connector then the warning lamp goes
> out, but I'm not sure this is definitive.   With the connector removed
> from  the alternator and 12v jumpered to the Brown/Yellow connector, then
> the warning lamp lights.   I have read over Dan Masters book, but I am not
> clear that the Brown/Yellow wire is live only with the alternator turning,
> ie the car running.   Is that the case?   If so, then, as you say, there's
> something amiss in the alternator.   Are the diodes replaceable or am I
> looking at a new alternator?
>
> John North
>
> On Tue, May 1, 2018 at 12:38 PM, Robert Lang <robertlangtr6 at yahoo.com>
> wrote:
>
> Hi John,
> The first thing I'd do is check to make sure that the proper light is
> inserted in the correct hole. I have switched oil pressure and alternator
> lights around when in a hurry or not paying attention. The alternator light
> should have a brown / yellow wire coming from the alternator and a white
> wire going to the ignition switch. Try pulling the brown yellow wire from
> the alternator and see if the light goes out. If so, there may be a short
> in the alternator diodes. I have seen that happen plenty of times. If the
> ignition light does not go out when you pull that wire form the
> alternation, then you have somehow connected the ignition light to the
> wrong circuit and there's voltage present. Failing that, if you have a a
> test light - poke around to see what's going on, but the basic problem is
> that a brown wire in the circuit is connected to that ignition light and as
> you may know, the browns are hot all the time as well as un-fused, so be
> careful. The only other things that I can think of are related to hooking
> up the wrong lamp in the ignition hole in the tach, so make sure you're
> working on the proper circuit.
>
> Good luck!
>
> Bob Lang
>
>
> On Tuesday, May 1, 2018, 11:44:30 AM EDT, John North via 6pack <
> 6pack at autox.team.net> wrote:
>
>
> I have been replacing the dash support and in the course of that
> disconnected  overdrive and other wiring wiring, but now I put things back
> together, the alternator warning light is on even when the ignition is off,
> key removed.   Can't figure this out, anybody got ideas?
>
> John North
> 1976 TR6
> ______________________________ _________________
> Support Team.Net http://www.team.net/donate. html
> <http://www.team.net/donate.html>
> Suggested annual donation  $12.96
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
>
> 6pack at autox.team.net
> http://autox.team.net/mailman/ listinfo/6pack
> <http://autox.team.net/mailman/listinfo/6pack>
>
> Unsubscribe/Manage: http://autox.team.net/mailman/
> options/6pack/robertlangtr6@ yahoo.com
> <http://autox.team.net/mailman/options/6pack/robertlangtr6@yahoo.com>
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/6pack/attachments/20180512/566c8d53/attachment.html>