I was taught that 13.8 to 14.2 volts - when the battery is fully
charged - was a good rule of thumb. It might be a good idea to charge
the battery overnight and then measure the alternator output voltage
after warming up the engine a bit. If it still looks a bit low, I'd try
disconnecting circuits from the fuse block one at a time, while
monitoring the alt output V to see if it jumps up.
Are you sure the alt belt isn't slipping a bit?
CR
Paul Hunt wrote:
> That is still not good, it should be 14.5v unless there is a significant
> load on the electrics from something. This is largely irrespective of the
> regulator number, and Clausager states that the 4TR was the external
> regulator used on the early 16AC alternators. If you measured this on the
> alternator output spades then the alternator is still the problem. 13.5v
> should be enough to keep the batteries charged, but you need to check the
> voltage with things like lights and wipers on. If it then drops to 13v or
> lower you run the risk of flattening the battery while driving.
>
> PaulH.
>
> ----- Original Message -----
> From: "MonteMorris" <mmorris@nemr.net>
> To: "MG list" <mgs@autox.team.net>
> Sent: Monday, April 19, 2004 7:02 AM
> Subject: battery drain-alternator
>
>
>
>>I've installed a new alternator (from O'Reilly's) that is putting out 13.5
>>volts at the alternator. Looking inside the housing it has a 14TR number
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