Qsi Gauge Wiring Diagrams; Tachometer Wiring Diagram - Mercury 40 FourStroke Service Manual

QSI Gauge Wiring Diagrams

Tachometer Wiring Diagram

Tachometer dial on back side of case must be set to position number 4.
WIRING DIAGRAM A
Use this wiring diagram when using a separate light switch for instrument lighting.
a -
b -
c -
d -
e -
WIRING DIAGRAM B
Use this wiring diagram when instrument lighting is wired directly to the ignition key switch.
(Instrument lights are on when ignition key switch is turned on.)
a -
b -
c -
d -
90-857046R1 NOVEMBER 2001
b
a
e
PURPLE or WHITE - Connect to Positive (+) 12 Volt
Light Switch Wire - 12 Volt
Position Light Bulb to the Switched Position
BLACK - Connect to Negative (-) Ground
GRAY or BROWN Wire
a
d
PURPLE or WHITE - Connect to Positive (+) 12 Volt
Position Light Bulb to the Unswitched Position
BLACK - Connect to Negative (-) Ground
GRAY or BROWN Wire
c
51106
b
WIRING DIAGRAMS
d
c
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