[T3] FW: Progress Thanks to P.A.

[Bobsnotch at aol.com]

In a message dated 5/31/2011 6:18:24 P.M. Eastern Daylight Time,  
dave at hallvw.clara.co.uk writes:

The  idiot lights have to have a 12V supply when the ignition is on.   Maybe
that's the problem.  They are not grounded in the cluster at  all, but by 
the
various circuits.

The oil pressure switch simply  grounds that bulb when the pressure is low,
the ignition warning light (low  voltage/not charging) simply gets grounded
when there's no charge to oppose  the 12V that should be on it when the
ignition is on.  The same power  lead is used to light the flasher 
indicators
when the switch is on left or  right (either one lights BOTH bulbs) when the
flasher relay is off to the  flasher bulbs themselves.  The flasher idiot
lights ground through the  flasher lamps themselves.  That's why the main
bulbs flash opposite to  the idiot ones.

I won't say that all three faults will be cured, but it  sounds as if you've
not got the 12V supply to the idiot light/fuel gauge  cluster from the
ignition fuse (ie only hot when ignition is on).  It  is carried by the 
BLACK
wire into the back of the cluster.  I've sent  you a photo by separate 
email.




This was my thought as well (both the ground issue, and no power). I  think 
Jim was trying to say the same thing, when he suggested looking at the  
72-73 wiring diagram in the Bentley. My thought was like yours though, that the 
 idiot lights were passing the ground thru their circuits, when he's trying 
to  either use the TS, or dash lights.  

Bob 65 Notch  S with sunroof and IRS (Krusty)
71 Notch (Krunchy)
64 T-34 Ghia  (Wolfie)
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