Troubleshooting; Electrical - Landoll 345E Operator's Manual

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 "Electrical System" on page 4-4.
PROBLEM
NO LIGHTS
LIGHTS FLICKERING
LIGHTS DIM
LIGHTS BRIGHT AND BURN OUT
FUSE BLOW-OUT OR CIRCUIT
BREAKER TRIPPING
LAMP BULB BURN OUT
PROBABLE CAUSE
Fuse blown
Connection at plug-in
Broken corroded wires
Ground wire loose
Wires shorted or loose
Grounding through fifth wheel
Voltage difference between trailer and
tractor
Grounding through fifth wheel
Voltage difference between trailer and
tractor
Vibration
Short circuit
Vibration
Short circuit
Loose connection
Intermittent short
Improper voltage
Chapter 5

Troubleshooting

SOLUTION
Replace fuse
Tighten connection
Replace wire
Clean and tighten ground
Locate, insulate, replace, or tighten
Locate broken ground wire (tractor or
trailer)
Match bulbs with tractor voltage
Locate broken ground wire (tractor or
trailer)
Match bulbs with tractor voltage
Locate source of vibration and repair
Replace fuse and try all accessories. If
fuse blows right away, locate short and
repair
Locate source of vibration and repair
Replace fuse and try all accessories. If
fuse blows right away, locate short and
repair
Check lamp sockets and ground
connections
Locate short and repair
Check voltage regulator output
5-1