TECHNICAL INFORMATION FOR LED AND FILAMENT BULB LIGHTING LED
Lens and housings that are polycarbonate, if cleaned with solvents, will result in the softening,
crazing, and/or cracking of the plastic. This is especially true of polycarbonate lamps and
mounting bases, which may be under stress in their normal applications. The following cleaners
are compatible with polycarbonate (not a complete list):
Mild soap and water
#1 and #3 denatured alcohol
Methyl, isopropyl, and isobutyl alcohols
The following must not be used to clean polycarbonate (not a complete list):
All lamps will last longer if they run cool. Dirt on the lens increases the heat, so keep them as
clean as possible. Other people must see your truck/trailer and that is one of the purposes of
the lighting system--to be seen.
Certain lighting products generate heat. Care should be taken to
avoid contact with flammable materials. The unit can generate
enough heat to cause injury to personnel and damage to the
Tips to Prolong Lighting Life
1. Never use a test probe to pierce wire insulation when troubleshooting lighting
problems. Wicking action takes place which causes moisture to travel along the
wire strands and corrode critical connections. If probing a harness or wire is
necessary, make sure the puncture is completely sealed.
2. To correct voltage problems, discover the real cause. Under-voltage often is caused
by poor connections. To correct under-voltage, don't just increase the voltage--find
out what caused the under-voltage.
3. Many discarded lamps are still in good condition. First, test with
A bulb with stretched or broken filaments was subject to vibration.
A yellowish, whitish, or bluish glaze on the bulb indicates a rupture in the bulb
A dark metallic finish indicates a poor seal in bulb.
Test all lamps one more time before you discard them. Up to 20%
of lamps discarded are still in good operating condition.
Lubricate sockets, pigtails, battery terminals, and connections with non-conductive
anti-corrosion compound. The purpose of the sealant is to totally encapsulate and
protect against corrosion and water.