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c.

Do not connect the red wire to the positive (+)

power source terminal at this time.

2.

Control Head Connections.

a.

Wrap the control cable’s stripped wire ends

with tape and route the cable to the control head mounting
location.

b.

See figure 2. Crimp five 1/4" straight terminals

on the cable wire ends and jumper wire combination.

c.

Connect the terminals on the switch as shown

in figure 2.

3.

Illuminated Power Switch.

CAUTION

Improper wiring of the illuminated switch feature will
result in printed circuit board damage. Ensure that the
chassis ground lead is connected to the gold (pin #3)
terminal and that the unterminated end of the lead is
connected to a known good chassis ground.

a.

See figure 2. Connect the right angle terminal

on the switch bracket ground lead to the gold (pin #3) terminal of
the on-off switch.

b.

Route the unterminated end of the ground lead

to a known good chassis ground. Cut the lead to length and crimp
the supplied ring terminal on the lead.

NOTE

If necessary, additional 18-gauge wire may be spliced to
the ground lead.

c.

Secure the lead to the chassis ground with a

user-supplied screw.

4.

Turn Signal Connections (optional).

a.

Crimp the two right angle terminals on one end

of two user-supplied 22-gauge wires. The wires should be long
enough to route from the light assembly to the right, and left, turn
signal lamp sockets.

b.

Remove and retain the three screws which

secure the light assembly end plate at the cable exit end.

c.

Remove the end plate and slide the lens

mounting plate out about six-inches.

Figure 1.

NOTE

When selecting a mounting location for the control head,
it is necessary to keep in mind the SignalMaster’s cable
length. Plan wiring and cable routing before installation.

1.

Select a mounting location for the control head that

allows the vehicle and controls to be operated safely at all times.

2.

Use the control head as a template and scribe two

drill position marks at the selected mounting location.

CAUTION

Before drilling holes in ANY part of a vehicle, be sure
that both sides of the mounting surface are clear of parts
that could be damaged; such as brake lines, fuel lines,
electrical wiring or other vital parts.

3.

Drill two holes at the previously scribed position

marks.

4.

Secure the control head to the mounting surface

with two user-supplied sheet metal screws.

C.

Electrical Connections.

WARNING

Failure to observe this WARNING may result in fire,
burns or blindness.

If shorted to vehicle frame, high current conductors can
cause hazardous sparks resulting in electrical fires or
molten metal.

If additional cable length is required, splice the same
gauge (or heavier) wire to the leads.

DO NOT connect this system to vehicle battery until ALL
other electrical connections are made and mounting of all
components is complete.

Verify that no short circuits exist, before connecting to
the Positive (+) battery terminal.

1.

Power Connections.

a.

Route the red and black 14-gauge wires to the

power source. Ensure that the power source is capable of supplying
an additional 15-amperes.

b.

Connect the black wire to a known good chassis

ground. This connection must be capable of supplying 15-amperes.

Figure 2.

-2-

OFF

ON

HAZARD

FEDERAL SIGNAL CORPORATION

290A3040

SWITCH

BRACKET

CHASSIS

GROUND LEAD

TO CHASSIS GROUND

SWITCH

ON/OFF/ON

SWITCH ON/OFF

DECAL

RED

NOTE: 
GOLD
(NO. 3)
TERMINAL
ON TOP

NOTE: TWO WIRES ARE 

CRIMPED IN ONE TERMINAL

NOTE: MATING FEMALE TERMINALS ARE CRIMPED

ON WIRES BEFORE CONNECTING TO SWITCHES.

CONTROL CABLE
ASSEMBLY

BLACK

RED

290A3041

WHITE

SWITCH BRACKET

REAR VIEW

JUMPER WIRE FROM

INSTALLATION KIT

GREEN

RED

GOLD

TERMINAL

OFF-ON

SWITCH

CHASSIS GROUND

HAZARD

SWITCH

3

2

1

3

2

1

CAUTION

IMPROPER WIRING OF THE ILLUMINATED SWITCH FEATURE

WILL RESULT IN P.C.B. DAMAGE.  ENSURE THAT THE CHASSIS GROUND

LEAD IS CONNECTED TO THE GOLD (PIN #3) TERMINAL AND THAT

THE UNTERMINATED END OF THE LEAD IS CONNECTED

TO A KNOWN GOOD CHASSIS GROUND.

Summary of Contents for SIGNALMASTER SM518A-24

Page 1: ...s SM518A 24 and SM428A 24 are economical low wattage directional light assemblies that are designed for use in a flashing mode Lens colors available are amber standard red blue green and clear These models provide two distinctive directional signals left arrow and right arrow In addition an alternating flash pattern produces a warning signal for use when a directional signal may not be appropriate...

Page 2: ...the control head as a template and scribe two drill position marks at the selected mounting location CAUTION Before drilling holes in ANY part of a vehicle be sure that both sides of the mounting surface are clear of parts that could be damaged such as brake lines fuel lines electrical wiring or other vital parts 3 Drill two holes at the previously scribed position marks 4 Secure the control head ...

Page 3: ...necting the right angle terminals to connectors H1 and H2 support the circuit board to avoid breaking the terminals or cracking the printed circuit board d See figure 3 Connect the two right angle terminals to connectors H1 and H2 Note which wire is attached to H1 and to H2 e Slide the lens mounting plate into the extru sion Route the 22 gauge wires through the grommet Secure the end plate on the ...

Page 4: ...enses are replaced Ordinary cleaning of the plastic lenses can be accom plished by using mild soap and a soft rag Should fine scratches or a haze appear on a lens they can ordinarily be removed with a non abrasive high quality one step automotive paste cleaner wax and a soft cloth 4 B Lamp Replacement CAUTION Use of higher wattage lamps can result in damage to the colored lenses 1 See figure 4 Rem...

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