Electrical Wiring; Stray Current Corrosion; General - Four winns Horizon Owner's Manual

Wire Color Wire Designation
Wires on positive (+) side of battery that go to
Red
starter. This wire is non-protected.
Red/Purple 50 amp protected wire that runs from the engine
Stripe to the fuse panel at the helm.
Yellow with Wire from starter switch to starter solenoid.
Red Stripe
Power lead to bilge blower from a fuse or switch.
Yellow
Sensor wire from tachometer sender to tachometer.
Dark Gray
Leads to bilge pump from switch.
Brown/Red
Leads to auto bilge pump.
Brown/Orange
Wire between ignition switch and coil. Wire from
Purple ignition switch through distribution panel to
electrical instruments.
Accessories
Orange
Wire from switch to instrument lights.
Dark Blue
Sensor wire from engine oil pressure sender to oil
Light Blue
pressure gauge.
Sensor wire from water temperature sender to
Tan
water temperature gauge.
Sensor wire from fuel tank level sender to fuel
Pink
gauge.
Trim position
Purple/White
Trim down
White/Green
Trim up
White/Blue
Trim power
White/Red
Ground
Black
Bow light
Gray/Green
Stern light
Gray/Blue
Wiring Color Code
Note: Some of these colors can serve more than one
type of circuit.
180/190/200 Horizon
Owner’s Manual
08/01
H - 5

STRAY CURRENT CORROSION

A. General
Electrically induced underwater corrosion occasionally
affects boats and their related components. This is re-
ferred to as “Stray Current Corrosion” and appears as
surface pitting or deterioration. Stray current corrosion
is the decomposition of chemical compounds by electric
current.
Stray current corrosion can be caused by the polarity of
the dockside wiring system of the boat being reversed
from the power source (reversed polarity) or surround-
ing boats, an improperly wired battery installation, other
boats that are in close proximity that have electrical power
leakages, or any other source close to the boat that has
electrical power leakage into the water. Stern drive units
are especially vulnerable to stray current corrosion.
Periodically inspect the drive components and thru-hull
fittings to determine if stray current corrosion damage
exists. If corrosion damage is found, determine and cor-
rect the cause of stray current to prevent further dam-
age. Consult an experienced marine electrician or con-
tact your Four Winns dealer for assistance.
The use of some shore power battery chargers, while
the boat is in the water and the battery is connected to
the system, can cause stray current corrosion. Have an
experienced marine electrician review any battery
charger installation to ensure a stray current corrosion
problem will not develop. An improper battery connec-
tion is a common cause of stray current corrosion.
NOTICE
Use only “Coast Guard” approved battery charg-
ers. Consult your Four Winns dealer for rec-
ommendations.
Corrosion is usually more prevalent in polluted or salt
water than in clean water. It is also more likely to occur
when dockage is in an area with steel piers, large metal
boats, or where shore power is in use.
Section H
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