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MAINTENANCE MANUAL
Kenworth SmartWheel Troubleshooting Guide
16
F. Marker Lamp Flash Does Not Work
F2. Symptom: Marker lights do not flash on with SmartWheel switch.
F2-1. Possible cause: Problem in circuit R3NO.
F3. Symptom: Marker lights do not blink off
with Smart
F3-1. Possible cause: Problem with multiplex control system.
Check
Result
What To Do Next
F2-1A
Unplug the 8 way connector from the
electronics module.
Check continuity of ckt R3NO from
pin 2 of the connector to dash
marker lamp switch.
Ckt has continuity.
Go to
F1
.
No continuity.
There is a break in the circuit
between the module and the dash
switch. Trace ckt R3NO.
F3-1A
Press Smartwheel marker lamp
flash switch. Listen for relay click in
power distribution box.
Click heard.
Marker lamp relay may be faulty. Go
to F1-4.
No click.
Go to A1.
