Star Headlight & Lantern 7400 Star Lase - Manual (Page 4)

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• All standard Laser lightbars have two 15’ harnesses. The first is a 2-conductor (plus a drain wire
and a foil shield) “power harness” that has a RED power wire and a BLACK ground wire. The
second harness is a 19-conductor cable (plus a drain wire and a foil shield) that is used to control
the various functions of the lightbar. Any Laser lightbars with a traffic director (arrowstick) will also
have a third, 10-conductor harness. All wires are color coded and sized at the correct gauge. If
this length is not sufficient, it is recommended that the wire harnesses be completely replaced,
with the only connections to be made directly at the terminal blocks inside the lightbar. This will
reduce the number of wire connections and help prevent any weathering problems on these
connections. Refer to the Wire Harness Replacement section on the page 5 for further
instructions on this.
• CAUTION: All wires and switches should be rated for at least 125% of their maximum
current load. In addition, the red power wire (from the Power Harness) should be connected to
the positive terminal of the battery and fused at the battery for 125% of its rated load. The current
for each component is shown on the Parts list on page 16. Do not use a 1/4" diameter glass fuse,
as it is not suitable for continuous duty above 20 amps. If you are unsure of the current draw,
please contact our Customer Service Department.
• TESTING THE LIGHTBAR BEFORE IT IS PROPERLY FUSED WILL VOID THE WARRANTY!!
• The black ground wire (from the Power Harness) should be connected to the negative terminal of
your vehicle’s battery. This wire should be at least #10 AWG wire and be as short as possible in
order to minimize the voltage loss in this wire and reduce any chance of overheating.
• The Control Wire Harness section and diagram on the next page lists the different wire colors and
the lights controlled by those wires. Your harness WILL contain all 19 of the colored wires, the
drain wire, and a foil shield, although they may not all be utilized.
All standard lightbar models are designed for 12VDC negative ground vehicles only.
Reverse polarity may cause serious damage to the lightbar and/or vehicle. Contact
the automotive dealer if there are any doubts about the polarity of your vehicle.
Please take the following steps to help eliminate any Radio Frequency Interference (RFI) with
your two-way radio.
• DO NOT run the power wire for the lightbar along same path as any antenna wires.
• DO NOT run the power wire for the lightbar along same path as any radio power
wires.
• DO NOT tap power for the lightbar off of the radio power wires.
• DO NOT mount the lightbar within 20” of any antennae. Sometimes mounting the
lightbar or antenna over by just one foot can make a large difference in the
interference.
• Ensure the black wire from the lightbar has a good connection to the negative side of
the battery.
RF INTERFERENCE
Mounting Instructions
Please review the separate Mounting Bracket manual that
is also enclosed with your bar for mounting instructions.
Wiring Instructions