Hour 1: First was to assess where and
how I could install a voltmeter gauge without bring too much attention to an aftermarket gauge. After some searching,
and the help of 42 Draft Designs (42DD), I purchased a MK3 single gauge panel that fit right next to the radio where
the heated seat dummy panel is located. With my car not having such an option, it was open space that was not being
used.
Hour 2: Removal of the heated seat dummy panel was required. Once
removed it was outlined by 42DD that dash material must be cut out to have a 2-1/16" gauge fit. Using the gauge panel
just recently purchased, the sized hole needed was outlined. Then using a 2-1/16" bore door knob drill bit, the unwanted
dash material was removed. With some test fitting of the panel and voltmeter gauge, the hole needed to be enlarged ever
so slightly; a basic file did the trick.
Hour 3: Involved the removal of the lower dash cover under the steering wheel
to gain access to the fuse / relay panel. Again, to get a correct reading, the voltmeter leads should be tapped into
a main circuit of the vehicle. Guided with a Bentley service manual wiring diagram and a test light, switched power
leads and grounds were found through the fuse / relay panel. The following wire colors are mandated in the MK3 by Volkswagen.
* black = switched power lead (positive)
* brown = ground wire (negative)
* blue / gray = illuimination power lead (positive)
Hour 4: Feed wiring through the dash to fuse / relay panel and tapped into
the needed wires to connect the voltmeter correctly. Used some sheathing and labeled all the added wires. I connected
the wires to the gauge, verified polarity, and tested the gauge out before complete fit and finish. With the gauge properly
working, the voltmeter was installed, wiring was organized, and parts were re-installed.
