Page 95 - REPOWER REFERENCE GUIDE (2020)

Engine Harness

Diagram

11 A B A B 10
ORN GRN WHT DK BLU

RED A
BLK B
ORN C
GRN D
F 9
E
PPL
GRA G
YEL H
WHT J
DK BLU K
PPL/WHT A
BLK B 8
RED C
PPL 1
7
BRN 1 5
PPL/WHT 1 1
GRN BLK/YEL
P 1
N YEL/RED 6
M GRA
L BRN BLK 1
K YEL
GRN/WHT
1 J H BLU/WHT PPL
G DK BLU
F WHT 4
E ORN YEL/RED 1
D BLK/YEL
C PPL
B BLK YEL/RED 1
A RED
RED B 3
A
BLU/WHT
GRN/WHT C
RED A
BLK B
PPL/WHT D 2
C
PPL
BLK/YEL E
YEL/RED F
12339
1 - 14‑pin Deutsch connector
2 - Key switch connector
3 - Trim switch (outboard only control)
4 - Neutral switch
5 - Lanyard switch (MerCruiser control) or key switch + connection
6 - Lanyard (outboard control) or E‑stop connection
7 - Warning horn
8 - Accessory relay connection (15 amp)
9 - Gauge connector
10 - CAN P (CAN 1) with resistor cap
11 - CAN V (CAN 3) with weather cap
NOTE: Dual engines are treated as two singles in the same boat and are not connected together.
NOTE: The lanyard stop switch on MerCruiser control (purple and purple/white wires) breaks power to the ECM or ignition to
stop the engine. The switch is normally closed until activated. Therefore the purple and purple/white wires must be connected
together if lanyard stop switch is not used, or if the E‑stop switch is used.
NOTE: Outboard control E‑stop switch (black and black/yellow wires) connects ground to ECM to stop engine. The switch is
normally open; the circuit closes when the switch is activated. Wires must be separate unless connected through E‑stop
switch.
Up to 15 amps total accessory power can be provided; on purple wire (switched) and the red wire (continuous power).
An accessory relay kit can be used for loads up to 40 amps. Refer to the MerCruiser Parts and Accessory Guide or
MerCruiser Rigging Guide.
Boat Wiring
NOTE: Twin engines are treated as two single engines in the same boat. No twin engine disconnect is required.

90-8M0149179 eng NOVEMBER 2018 © 2019 Mercury Marine Page 4D-15