Electrical Troubleshooting - MacDon M105 Operator's Manual

6.2 Electrical Troubleshooting

Symptom Problem
Defective battery
Loose or corroded
connections
Low voltage and/or
battery will not Defective alternator belt
charge.
Alternator or voltage regulator
not connected properly
Dirty or defective alternator,
defective voltage regulator, or
high resistance in circuit
Defective light switch
Lights dim.
High resistance in circuit or
poor ground on lights
Burned out or defective
light bulb
Lights do not light.
Broken wiring
Poor ground on lights
Open or defective circuit
breaker
Defective relay
Defective light switch
169890
TROUBLESHOOTING
Solution
Have battery tested.
Clean and tighten battery connections.
Replace worn belt.
Connect properly.
Contact Dealer.
Check the wiring circuit for a break in
a wire or a poor ground.
Replace light bulb.
Check wiring for broken wire or shorts.
Clean and tighten ground wires.
Check circuit breaker.
Replace relay.
Contact Dealer.
323
Section
Batteries, page
259
Maintaining
Batteries, page
260
Replacing Fan
Belt, page 256
Batteries, page
259
Contact Dealer.
—
Replacing Field
Light Bulb, page
270
Replacing Bulb
in Cab-Forward
Flood Light, page
270
Swath Lights, page
275
Amber Lights,
page 276
Beacons (if
installed), page
277
Replacing HID
Lamp (if Installed),
page 273
—
Circuit Breakers
and Fuses, page
282
Replacing Circuit
Breakers and
Relays, page 283
Contact Dealer.
Revision A