[6pack] [TR] Alternator not charging battery - 1976 TR6

[Ron Cirillo]

I have looked at that circuit and with your answers, the only thing I come up with is defective voltage regulator (that is based on testing as indicated below).  There really isn't much to go wrong with the alternator itself.  However, regulators and off shore sourcing can be a real problem.  If they are made in china who knows if they will work or not.  If the rebuilt alternators are using new stock regulators there could be a bad lot of them out there.

Ron

From: 6pack <6pack-bounces at autox.team.net> On Behalf Of dctr6 at optonline.net
Sent: Wednesday, September 30, 2020 5:13 PM
To: 'Jim Henningsen' <trguy75 at gmail.com>; triumphs at autox.team.net
Cc: 6pack at autox.team.net
Subject: Re: [6pack] [TR] Alternator not charging battery - 1976 TR6

Actually, no they don't have the facilities.  However, I have taken the 2nd alternator to a local auto electric shop where they tested it and it's only putting out a little over 13 volts which I do not believe is enough.  I plan to retrieve my original alternator and have it re-built (which I should have done in the first place).
Dennis

From: Jim Henningsen <trguy75 at gmail.com<mailto:trguy75 at gmail.com>>
Sent: Wednesday, September 30, 2020 12:31 PM
To: dctr6 at optonline.net<mailto:dctr6 at optonline.net>; triumphs at autox.team.net<mailto:triumphs at autox.team.net>
Cc: 6pack at autox.team.net<mailto:6pack at autox.team.net>
Subject: RE: [TR] Alternator not charging battery - 1976 TR6

Can't the parts place test the alternator off the car with their machine?  Jim Henningsen

From: Triumphs <triumphs-bounces at autox.team.net<mailto:triumphs-bounces at autox.team.net>> On Behalf Of dctr6 at optonline.net<mailto:dctr6 at optonline.net>
Sent: Wednesday, September 30, 2020 12:04 PM
To: triumphs at autox.team.net<mailto:triumphs at autox.team.net>
Cc: 6pack at autox.team.net<mailto:6pack at autox.team.net>
Subject: [TR] Alternator not charging battery - 1976 TR6

   Here's a synopsis - Almost new battery went dead. Charged battery and took car to shop. Meter shows alternator is not charging battery (only 12 volts, not 14.6 as per Dan Master's book). Buy rebuilt alternator and the same thing happens.  Swap alternator for a second rebuilt unit - same thing, battery is not being charged. Tried 3 different meters - all showed 12 volts.  Hard to believe I got 2 bad rebuilt alternators.  What's wrong??
Dennis Culligan, 1976 TR6
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