INSTRUMENTS AND CONTROLS PART 4: CONTROLS AND DISPLAYS
– 24 – Y53-6032 (R05/10)
6.Anti-Lock Brake System (ABS), Trailer
Illuminates during the Instrumentation Sys-
tem Self Test and the tractor/truck is con-
nected with a ABS equipped trailer.
Illuminates during normal operating condi-
tions to indicate a problem with the Trailer
ABS System. This should be checked by a
Peterbilt dealer as soon as possible. See
“Truck/Tractor ABS Warning Lamp” on
page 109 for more information.
NOTE: Tractors/Trucks and trailers built after 3/1/
01 must be able to turn on an In-Cab Trailer ABS
Warning Lamp (per U.S. FMVSS121). The indus-
try chose Power Line Communication (PLC) as
the standard method to turn it on. See “Trailer ABS
Warning Lamp” on page 110 for more information.
On trailers built prior to 3/1/01 verify trailer ABS
system status via the required external warning
lamp mounted on the trailer. The indicator lamp
on the trailer should be yellow and identified with
the letters "ABS".
7. Axle, Inter-Axle Differential Locked
(Tandem Axles)
Illuminates when the inter-axle differential
switch is ON thus locking the inter-axle differ-
ential. This powers the forward rear and the
rear rear differentials equally. When the
switch is turned off (inter-axle differential
unlocked) the engine power is allowed to flow
to any of the 4 drive tires based on the differ-
ential effect (mostly to the forward rear differ-
ential). (This feature is standard on all
tandem axles).
8.Clock, Alarm Bell
Illuminates when the alarm is set. It will flash
when the clock alarm is active.
9. Cruise Control, Active
Illuminates when cruise control is active.
10.Dump Truck, Body Up
Illuminates when Truck Dump Body is up.
Y53-6032.book Page 24 Monday, May 24, 2010 3:37 PM
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