Symptom
Problem
Solution
Section
Replacing
Headlight Bulb
(Engine-Forward),
page 329
Replacing Bulbs
in Standard Work
Lights, page 327
Replacing LED
Lights (Deluxe
Cab Only), page
330
Replacing Bulbs
in Red and Amber
Lights, page 331
Replacing Red Tail
Lights, page 332
Replacing Beacon
Lights, page 333
Burned out or defective
light bulb
Replace light bulb.
Replacing the
Cabin Dome
Bulb and Light
Assembly, page
333
Broken wiring
Check wiring for broken wire or shorts.
Poor ground on lights
Clean and tighten ground wires.
—
Open or defective circuit
breaker
Check circuit breaker.
5.14.8 Accessing
Circuit Breakers
and Fuses, page
335
Defective relay
Replace relay.
Replacing Circuit
Breakers and
Relays, page 337
Lights do not light
Defective light switch
Contact Dealer.
Contact Dealer
Turn signals or
indicators showing
wrong direction
Reversed wires
Contact Dealer.
Contact Dealer
Broken or disconnected wire
Contact Dealer.
Contact Dealer
No current to cab
Circuit breaker tripped
Breaker automatically resets.
—
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Revision A
Summary of Contents for M1240
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