Mercury MerCruiser Service Manual page 343

• Ground connection
• SmartCraft sensor connections
Secure the wiring and position the engine connector out of the way until the engine is installed.
After the engine is in place, make the single connection between the transom and the engine.
DTS engines are shipped with an adapter to connect the transom harness to the power trim pump.
b
a
Transom Ground Connection
The ground wire for the transom is incorporated into the transom harness included with the engine.
Connect the ground wire in the transom harness under the bonding strap screw on the transom. Do not connect any other
ground wires here.
Use the ground studs on the flywheel housing for other grounding needs.
NOTE: In some cases, a ground wire to connect to the flywheel housing may be attached to the bonding screw on the transom.
This ground wire is not needed with the transom harness, but can be connected to the flywheel housing or removed. In any
case the grounding wire in the transom harness must be connected to the bonding strap screw.
a
Wire Color Code Abbreviations
BLK
BRN
GRN
PNK
RED
WHT
LT or LIT
90-8M0099748 eng DECEMBER 2015
e
c
d
f
b
25173
Black
Brown
Green
Pink
Red
White
Light
h
i
g
j
Ground wire from the transom harness to the transom bonding strap
screw
a - Bonding strap screw
b - Ground wire from transom harness
Wire Color Abbreviations
BLU
GRY or GRA
ORN or ORG
PPL or PUR
TAN
YEL
DK or DRK
© 2016 Mercury Marine
Instrumentation and Controls
Transom harness—DTS
a - 16‑pin connector to engine harness
b - Trim from helm
c - Trim bypass
d - Trim bypass
e - Trim pump
f - Ground
g - Pitot
h - Digital trim
i - MerCathode
j - Steering
Blue
Gray
Orange
Purple
Tan
Yellow
Dark
Page 4D-13