WIRING DIAGRAMS SERVICE MANUAL NUMBER 23
Page 4E-2 90-861326--1 MARCH 1999
Wiring Colors for MerCruiser
NOTE: Color codes listed below DO NOT apply to fuel injection system harnesses.
BIA COLOR CODE AND
ABBREVIATIONS
WHERE USED
BLACK (BLK) All Grounds
BROWN (BLU) Reference Electrode - MerCathode
ORANGE (ORN) Anode Electrode - MerCathode
LT. BLUE/WHITE (LT BLU/WHT) Trim - “Up” Switch
GRAY (GRY) Tachometer Signal
GREEN/WHITE (GRN/WHT) Trim - “Down” Switch
TAN (TAN) Water Temperature Sender to Gauge
LIGHT BLUE (LT BLU) Oil Pressure Sender to Gauge
PINK (PNK) Fuel Gauge Sender to Gauge
BROWN/WHITE (BRN/WHT) Trim Sender to Trim Gauge
PURPLE/WHITE (PUR/WHT) Trim - “Trailer” Switch
RED (RED) Unprotected Wires from Battery
RED/PURPLE (RED/PUR) Protected (Fused) Wires from Battery
RED/PURPLE (RED/PUR) Protected (+12V) to Trim Panel
ORANGE (ORN) Alternator Output
PURPLE/YELLOW (PUR/YEL) Ballast Bypass
PURPLE (PUR) Ignition Switch (+12V)
YELLOW/RED (YEL/RED)
Starter Switch to Starter Solenoid to
Neutral Start Switch
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