[T3] Question on my 73 T-3 Square back . Charging system.

[William J]

 I don't have any of those issues . I did check the battery voltage today 
and it was 12.32 volts so I put it on the charger @ 2 amp charge setting on 
the timer for a 3 hour charge . I have not charged it for some time. As an 
aside my voltage regulator is the Bosch electronic type and I read 14.3 
volts when @2000 rpm engine speed.

 I am going to hook up my DVOM at the battery once the Battery is near it's 
top end charge which seems to be 12.7 volts then run the engine and turn on 
the lights and see what I've got at the battery . That should tell me if 
it's a voltage drop to the fuse box .  If it reads low at the gauge as it 
did last night then I will add the lead from battery B+ to the relay as you 
suggested . I may just run a wire over the carpet to the relay before I 
spend time on a permanet install just to see how it reacts. One other bit I 
forgot to mention . I noticed when I just had the park lamps on engine 
running the gauge read the same as when I had the headlamps on at idle . Not 
long ago I had the headlamp switch out as well as the 4 way and cleaned all 
the terninals on both and checked for loose connections and after I didn't 
see any change as in it still read the same at the VDO volt meter. I also 
checked voltage drop ground side and the only place I saw any drop at the 
engine was the coil there I had a 1 volt drop . I checked both positive and 
negative voltage drop and the coil were both  1 volt. I checked the battery 
posts and to the battery to reg red/white and all was fine.

William
----- Original Message ----- 
From: "Jim Adney" <jadney at vwtype3.org>
To: <type3 at vwtype3.org>
Sent: Sunday, July 01, 2018 3:51 PM
Subject: Re: [T3] Question on my 73 T-3 Square back . Charging system.


> On 1 Jul 2018 at 12:53, William J wrote:
>
>> So @ 2000 rpm engine speed no load voltage test connected as above Reg
>> B+ voltage should  read 13.5 -14.5 .
>
> Assuming we're working with a charged battery, under those conditions the
> voltage should be 14.1 - 14.4 V. The variation reflects the calibration 
> and
> wear of the voltage regulator.
>
> If this voltage is lower than 14.1 V, the voltage regulator is worn, 
> there's
> something wrong with the generator, or the battery is discharged. If the
> battery is discharged, continue the test to see if the voltage comes up as 
> the
> battery gets charged.
>
> If this voltage is higher than 14.4 V, the voltage regulator is faulty 
> (out of
> calibration) or the DF wire has a short to ground.
>
> -- 
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
>
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