[T3] Fuel Gauge Grounding Solution

[William Jahn]

Jim :

 Yes, the one with ground on it is the one I have. I do know the 72 had it
too. It comes off that gauge ground as a double brown wire in the Schematic
. One goes to the gauge ground, the other to the ground tree above the fuse
box up high. The gauge ground is #12 the tree is # 10 . You can see them on
the far right coming off the Flasher switch.  The wiper motor and many
other grounds including the dash lights are grounded there. I'm only going
by the Bentely , but I do remember replacing that plastic plug with the one
from the 72 because the 73 had a loose rivet and I didn't feel like fixing
it at the time. I kept it just in case.

On Thu, Jan 26, 2023 at 5:36 PM Jim Adney <jadney at vwtype3.org> wrote:

> On 26 Jan 2023 at 16:50, William Jahn wrote:
>
> >  My 73 already has a ground wire on one of the tabs on the back of black
> > plastic plug. It has a 1/4 female spade connector on it, forget which one
> > but it's a ground just for the fuel gauge. I noticed a few times that if
> I
> > turn on the 4 ways the gauge needle moves , I just reach up and pull it
> > off the tree on the left of steering wheel and see if it's tight and
> clean
> > , if clean , work it a few times and it clears the problem .
>
> Hmmm, guess I'll have to look into this a bit deeper.
>
> Okay, I just looked thru my stash of instrument panel bits and came up
> with 2
> different styles of bulb holder. The early one has just a rivet holding
> that
> brass ground connector sleeve in the holder; the late one has a 1/4" tab
> on
> the outside, held on by that same rivet. That tab is marked 31 (ground.)
>
> There's no date on these parts, so I can't tell when VW started this, but
> probably in '69. The parts book shows the latest part for all years, so it
> superceeded the early bulb base.
>
> I'll have to check my cars to see if its connected, and to what.
>
> The mod I suggested might still be useful for early cars, but for later,
> probably '69-on, it looks like VW already took care of this, but it has
> connection problems.
>
> Looks like I dived down this rabbit hole too quickly.
>
> --
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
>
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