Mercury V6 175 Diagnostic Manual page 191

The start relay is located in the bottom of the electrical panel, at the rear of the engine.
a
H
A
4 1
a - PCM connector A
b - Start relay socket
c - Main power relay (MPR) socket
d - Starter solenoid
e - Starter power stud (+)
f - Hot stud (battery +)
g - Fuses ‑ 20‑amp fuse
Connector
86
87
MPR
MPR
90-8M0146617 eng JULY 2018
a
b
b
87
85 86
30
30858687
A1 109A
A2
E2
H4
106B
Pin
30
30
85
86
85
87
59637
86
87
66554
c
87
85 86
30
30858687
d
109B
105B
105A
Wire Color
Red
Red/blue
Black/blue
Yellow/red
Yellow/purple
Red/white
© 2018 Mercury Marine
Actuators and Relays
a - Electrical panel
b - Start relay socket on the engine
c
harness
c - Start relay
f
e
A1
A2
A3
A4
A5
A6
B1
B2
B3
B4
B5
B6
C1
C2
C3
C4
RED/WHT
C5
RED/BLU
C6
Function
12 V battery power (+)
Fused (20 A) 12 V power (+)
Start relay control
Starter solenoid power (+)
MPR control signal
Switched 12 V power (+)
g
65462
PCM
–
–
AE2
–
AA2
–
Page 5B-7