Mercury Optimax 115 Service Manual page 128

LIGHT BULB POSITION B
Use this position when instrument lighting is wired directly to the ignition key switch. (In-
strument lights are on when ignition key switch is turned on.)
a -
b -
SENDER WIRING
a -
b -
90-855347R1 JANUARY 1999
Position Light Bulb to the Unswitched Position
Sender
b
b
Connect to +12 Volt
Connect to NEGATIVE (–) Ground
a
b
51112
a
a
51108
WIRING DIAGRAMS
Page 2D-13