Water Temperature Gauge - Mercury Optimax 115 Service Manual

Water Temperature Gauge

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 is turned on.)
a -
b -
c -
d -
90-855347R1 JANUARY 1999
b
a
Connect to + 12 Volt
+12 Volt Light Switch Wire
Position Light Bulb to the Switched Position
Connect to NEGATIVE (–) Ground
Connect to TAN Lead located at the Tachometer Receptacle on Commander
Side Mount Remote Control or TAN Lead coming from Accessory Ignition/
Choke Assembly.
a
Connect to +12 Volt
Position Light Bulb to the Unswitched Position
Connect to NEGATIVE (–) Ground
Connect to TAN Lead located at the Tachometer Receptacle on Commander
Side Mount Remote Control or TAN Lead coming from Accessory Ignition/
Choke Assembly
c
d
SEND
e
b
c
SEND
d
51105
WIRING DIAGRAMS
Page 2D-11