Operating instructions

Engine Hour Meter
Quartz Clock
Power Trim Gauge
D. For electrical connection
of sender unit refer to
power trim manufacturer
instruction (owners
manual)
D. Positive Gauge terminal
must be connected to
+12 V only if engine is
running (i.e. ignition
switch, pressure switch)
If you should not get proper readings from Siemens VDO Gauge:
DO NOT attempt to open, as this voids any warranty!
Check wiring, especially for proper ground.
All gauges are floating grounds: you have to run a separate
ground connection from terminal "-" to ground.
If sender is standard ground, make sure the engine/gearbox has
common ground, i.e. is grounded to same battery negative as
gauges.
In case of sender being floating ground, ground terminal has to
be connected to gauge negative.
Not for Voltmeter, Engine Hour Meter and Quartz Clocks:
Pull sender lead from sending unit. Pointer must now move fully
to one side of scale. Then, ground sender lead. Pointer must
now peg to opposite side of scale.
If both occurs, your gauge and wiring is basically o.k., the
problem will be a defective or improperly grounded sending
unit.
Siemens VDO Instruments are repairable.
D. Positive Gauge
Terminal must
be connected
12 V source.
ALLENTOWN, PA USA 1-800-265-1818
http://sso
-
usa.siemensvdo.com/
Permanent +12V
Dash Light Switch
A. Disconnect battery.
B. Cut 2 - 3/32" hole in a suitable position in dash. Make sure rear of instrument
has sufficient clearance from existing equipment and wiring.
C. Wire gauge according to diagram.
to unswitched