Mercury V8 250

NOTE: Advanced Sound Control features are identified as "AEV" in CDS G3; AEV_DutyCycle, AEV_OutputFault, AEV valve,
etc.
a - PCM connector A
b - PCM connector B
c - PCM connector C
d - Hot stud
e - Main power relay (MPR)
f - Engine fuses: 5‑amp fuse
g - Advanced sound control (ASC) connector
h - Chassis ground
Connector Pin Wire Color Function PCM
1
2
3
4
65662
1 Black Chassis ground (–) –
2 White/black Advanced sound control (ASC) CF3
3 Orange/gray Fused (5 A) 12 V power (+) –
4 Green ASC diagnostic BE3
MPR 87 Red/white Switched 12 V power (+) –
MPR 86 Yellow/purple Main power relay (MPR) control signal AA2
Hot stud ring terminal – Red 12 V battery power (+) –
d
e
f
g
h
a
b
c
104B
105C
105B
109B
RED/WHT
WHT/BLK
WHT/BLK
ORN/GRA
BLK
GRN
GRN
BLK
RED/WHT
RED
RED
RED
YEL/PPL
YEL/PPL
ORN/GRA
1
2
3
4
5A
A1
A2
A3
A4
A5
A6
B1
B2
B3
B4
B5
B6
C1
C2
C3
C4
C5
C6
30
85
86
87
F3
A1
H4
E3
A1
M4
A2
A1
H4
87
30
8685
1 2
3
4
A
B
C
D
E
F
G
H
1
2
3
4
A
B
C
D
E
F
G
H
A B
C
D E F G H
J
K
AB
C
DE
FGH
J
K
1
3
2
4
L
M
L
M
A
B
C
D
E
F
G
H
1
2
3
4
A
B
C
D
E
F
G
H
M
A
4
1
A
H
1
4
H
A
4
1
B6 B5
B4
B3
B2
B1
C6
C5 C4 C3 C2
A6 A5 A4 A3 A2 A1
C1
65438
1
4
Accessories
90-8M0146617 eng JULY 2018 © 2018 Mercury Marine Page 5C-3