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7
Electrical 579 Family
Peterbilt Motors Company 7-21
#
Function
Interlock
Default
Range
Options for
Interlock
11
Fifth Wheel Slide
Under Speed Threshold
7
0-10
Standard
12
Front-Axle Declutch
Under Speed Threshold
25
0-70
Standard
13
Inter-Axle Differential
Lock
Under Speed Threshold
25
0-70
Standard Non-
Configurable
14
3
Kingpin Release
(Momentary)
Park Brakes Set
Standard
15
Rear Axle Declutch
(aka. Transfer Case
Engage)
Under Speed Threshold
& Transmission In
Neutral
7
0-10
Standard Non-
Configurable
16
Transfer Case Hi/Low
Under Speed Threshold
& Transmission In
Neutral
7
0-10
Standard Non-
Configurable
17
1
Aux Trans 3-Position
Control (AT1202) w/
Park Brake Interlock
Park Brakes Set
Optional Add
18
Front Axle Declutch
(not currently used)
Under Speed Threshold
25
0-70
Standard
19
1
PTO 2-Position
(Fwd/Rev) w/ Park
Brake Interlock
Park Brakes Set
Optional Add
20
PTO #1 w/ Park Brake
Interlock
Park Brakes Set
Optional Add
21
PTO #2 w/ Park Brake
Interlock
Park Brakes Set
Optional Add
22
Trailer Dump Gate
(single) w/ Speed
Interlock
(EoA version - KW
ONLY)
Under Speed Threshold
25
0-40
Optional Add
23
Trailer Belly Dump
(Center) w/ Speed
Interlock
(not currently used)
Under Speed Threshold
25
0-40
Optional Add
24
Trailer Belly Dump
(Forward) w/ Speed
Interlock
(EoA version - KW
ONLY)
Under Speed Threshold
25
0-40
Optional Add
25
Trailer Belly Dump
(Rear) w/ Speed
Interlock
(EoA version - KW
ONLY)
Under Speed Threshold
25
0-40
Optional Add
26
Truck Dump Gate w/
Speed Interlock
(EoA version - KW only)
Under Speed Threshold
25
0-40
Optional Add
27
Wheel Diff. Lock Axle
(Single Rear) w/ Speed
Interlock
Under Speed Threshold
25
0-40
Optional Non-
Configurable
28
Wheel Diff. Lock Axle
(Forward Rear) w/
Speed Interlock
Under Speed Threshold
25
0-40
Optional Non-
Configurable
29
Wheel Diff. Lock Axle
(Center Rear) w/ Speed
Interlock
Under Speed Threshold
25
0-40
Optional Non-
Configurable