• 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.
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
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.
Ground wire from the transom harness to the transom bonding strap
screw
a - Bonding strap screw
b - Ground wire from transom harness
Wire Color Code Abbreviations
Wire Color Abbreviations
BLK Black
BLU Blue
BRN Brown GRY or GRA Gray
GRN Green ORN or ORG Orange
PNK Pink PPL or PUR Purple
RED Red TAN Tan
WHT White YEL Yellow
LT or LIT Light DK or DRK Dark
Instrumentation and Controls
90-8M0099748 eng DECEMBER 2015 © 2016 Mercury Marine Page 4D-13
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