Landoll 345C, Operator'S Manual

Page: 55 / 64

5 TROUBLESHOOTING
5-1 ELECTRICAL
Most electrical system problems show up as a burned out light or fuse, or inoperative electrical
component. Wiring, grounds, or components may be at fault. Locate the symptom in this section that
best identifies your electrical problem. Check out each possible problem under that symptom. If the
problem cannot be located, see an automotive electrical specialist. For maintenance procedures, see
Section 4-5.
SYMPTOM PROBLEM: REMEDY
NO LIGHTS Fuse blown: replace fuse.
Connection at plug-in: tighten connection.
Broken or corroded wires: replace wire.
Ground wire loose: clean and tighten ground.
LIGHTS FLICKERING Wires shorted or loose: locate, insulate, replace, or tighten.
Grounding through fifth wheel: locate broken ground wire
(tractor or trailer).
LIGHTS DIM Voltage difference between trailer & tractor: match bulbs
with tractor voltage.
Grounding through fifth wheel: locate broken ground wire
(tractor or trailer).
LIGHTS BRIGHT & BURN OUT Voltage difference between trailer & tractor: match bulbs
with tractor voltage.
FUSE BLOW-OUT OR CIRCUIT
BREAKER TRIPPING
Vibration: locate source of vibration and repair.
Short circuit: replace fuse and try all accessories. If fuse
blows right away, locate short and repair.
LAMP BULB BURN OUT Vibration: locate source of vibration and repair.
Short circuit: replace fuse and try all accessories. If fuse
blows right away, locate short and repair.
Loose connection: check lamp sockets and ground connec-
tions.
Intermittent short: locate short and repair.
Improper voltage: check voltage regulator output.
5-1